Part 10: Later work on St Peter's, Vasari as Architect, the Porta Pia, the project for S. Giovanni dei Fiorentini. the San Gallo conspiracy, the S. Lorenzo staircase,

Vasari's Lives of the Artists

MICHELAGNOLO was excused by Duke Cosimo, hearing of these misfortunes, from coming to Florence; the Duke saying to him that his contentment and the continuation of S. Pietro were more dear to him than anything in the world, and that he should rest in peace. Whereupon Michelagnolo wrote to Vasari, on the same sheet in which he thanked the Duke to the best of his power and knowledge for such kindness, saying, "God give me grace that I may be able to serve him with this my poor person, for my memory and my brain are gone to await him elsewhere." The date of this letter was August in the year 1557. Thus, then, Michelagnolo learned that the Duke esteemed his life and his honor more than he did himself, who so revered him. All these things, and many more that it is not necessary to mention, we have in our possession, written in his hand.

Michelagnolo by this time was reduced to a feeble condition, and it was evident that little was being done in S. Pietro, now that he had carried on a great part of the frieze of the windows within, and of the double columns without, which curve above the great round cornice* [* Drum] where the cupola is to be placed, as will be related; and he was exhorted and urged by his greatest friends, such as the Cardinal of Carpi, Messer Donate Giannotti, Francesco Bandini, Tommaso de' Cavalieri, and Lottino that, since he saw the delay in the raising of the cupola, he should at least make a model of it. He stayed many months without making up his mind to this, but in the end he made a beginning, and then little by little constructed a small model in clay, from which, as an exemplar, and from the plans and profiles that he had drawn, it might be possible afterwards to make a larger one of wood.

This, having made a beginning with it, he caused to be constructed in little more than a year by Maestro Giovanni Franzese, with much study and pains; and he made it on such a scale that the smaller proportions of the model, measured by the old Roman palm, corresponded with complete exactness to those of the large work, he having fashioned with diligence in that model all the members of columns, bases, capitals, doors, windows, cornices, projections, and likewise every least thing, knowing that in such a work no less should be done, for in all Christendom, nay, in all the world, there is not to be found or seen any fabric more ornate or more grand. And I cannot but think that, if we have given up time to noting smaller things, it is even more useful, and also our duty, to describe this manner of design for building the structure of this tribune with the form, order, and method that Michelagnolo thought to give it; wherefore with such brevity as we may we will give a simple description of it, to the end that, if it should ever be the fate of this work, which God forbid, to be disturbed by the envy and malice of presumptuous persons after the death of Michelagnolo, even as we have seen it disturbed up to the present during his lifetime, these my writings, such as they may be, may be able to assist the faithful who are to be the executors of the mind of that rare man, and also to restrain the malignant desires of those who may seek to alter it, and so at one and the same time assist, delight, and open the minds of those beautiful intellects that are the friends of this profession and regard it as their joy.

I must begin by saying that according to this model, made under the direction of Michelagnolo, I find that in the great work the whole space within the tribune will be one hundred and eighty-six palms, speaking of its width from wall to wall above the great cornice of travertine that curves in a round in the interior, resting on the four great double piers that rise from the ground with their capitals carved in the Corinthian Order, accompanied by their architrave, frieze, and cornice, likewise of travertine ; which great cornice, curving right round over the great niches, rests supported upon the four great arches of the three niches and of the entrance, which form the cross of the building. Then there begins to spring the first part of the tribune, the rise of which commences in a basement of travertine with a platform six palms broad, where one can walk; and this basement curves in a round in the manner of a well, and its thickness is thirty-three palms and eleven inches, the height to the cornice eleven palms and ten inches, the cornice over it about eight palms, and its projection six and a half palms. Into this basement you enter, in order to ascend the tribune, by four entrances that are over the arches of the niches, and the thickness of the basement is divided into three parts; that on the inner side is fifteen palms, that on the outer side is eleven palms, and that in the centre is seven palms and eleven inches, which make up the thickness of thirty-three palms and eleven inches.

The space in the center is hollow and serves as a passage, which is two squares in height and curves in a continuous round, with a barrel-shaped vault ; and in line with the four entrances are eight doors, each of which rises in four steps, one of them leading to the level platform of the cornice of the first basement, six palms and a half in breadth, and another leading to the inner cornice that curves round the tribune, eight palms and three- quarters broad, on which platforms, by each door, you can walk conveniently both within and without the edifice, and from one entrance to another in a curve of two hundred and one palms, so that, the sections being four, the whole rircuit comes to be eight hundred and four palms. We now have to ascend from the level of this basement, upon which rest the columns and pilasters, and which forms the frieze of the windows within all the way round, being fourteen palms and one inch in height, and around it, on the outer side, there is at the foot a short order of cornice work, and so also at the top, which does not project more than ten inches, and all of travertine; and so in the thickness of the third part, above that on the inner side, which we have described as fifteen palms thick, there is made in every quarter-section a staircase, one half of which ascends in one direction and the second half in another, the width being four palms and a quarter; and this staircase leads to the level of the columns. Above this level there begin to rise, in line with the solid parts of the basement, eighteen large piers all of travertine, each adorned with two columns on the outer side and pilasters on the inner, as will be described below, and between the piers are left the spaces where there are to be all the windows that are to give light to the tribune. These piers, on the sides pointing towards the central point of the tribune, are thirty-six palms in extent, and on the front sides nineteen and a half. Each of them, on the outer side, has two columns, the lowest dado of which is eight palms and three-quarters broad and one palm and a half high, the base five palms and eight inches broad and palms and eleven inches high, the shaft of the column forty-three and a half palms high, five palms and six inches thick at the foot and four palms and nine inches at the top, the Corinthian capital six palms and a half high, with the crown of mouldings nine palms.

Of these columns three quarters are to be seen, and the other quarter is merged into the corner, with the accompaniment of the half of a pilaster that makes a salient angle on the inner side, and this is accompanied in the central inner space by the opening of an arched door, five palms wide and thirteen palms and five inches high, from the summit of which to the capitals of the pilasters and columns there is a filling of solid masonry, serving as a connection with two other pilasters that are similar to those that form a salient angle beside the columns. These two pilasters correspond to the others, and adorn the sides of sixteen windows that go right round the tribune, each with a light twelve palms and a half wide and about twenty-two palms high. These windows are to be adorned on the outer side with varied architraves two palms and three-quarters high, and on the inner side they are to be adorned with orders likewise varied, with pediments and quarter-rounds; and they are wide without and more narrow within, and so, also, they are sloped away at the foot of the inner side, so that they may give light over the frieze and cornice. Each of them is bordered by two flat pilasters that correspond in height to the columns without, so that there come to be thirty-six columns without and thirty-six pilasters within; over which pilasters is the architrave, which is four palms and three-quarters in height, the frieze four and a half, and the cornice four and two- thirds, with a projection of five palms; and above this is to go a range of balusters, so that one may be able to walk all the way round there with safety. And in order that it may be possible to climb conveniently from the level where the columns begin, another staircase ascends in the same line within the thickness of the part that is fifteen palms wide, in the same manner and of the same width, with two branches or ascents, all the way up to the summit of the columns, with their capitals, architraves, friezes, and cornices; insomuch that, without obstructing the light of the windows, these stairs pass at the top into a spiral staircase of the same breadth, which finally reaches the level where the turning of the tribune is to begin.

All this order, distribution, and ornamentation is so well varied, commodious, rich, durable, and strong, and serves so well to support the two vaults of the cupola that is to be turned upon it, that it is a very ingenious thing, and it is all so well considered and then executed in masonry, that there is nothing to be seen by the eyes of one who has knowledge and understanding that is more pleasing, more beautiful, or wrought with greater mastery, both on account of the binding together and mortising of the stones and because it has in it in every part strength and eternal life, and also because of the great judgment wherewith he contrived to carry away the rainwater by many hidden channels, and, finally, because he brought it to such perfection, that all other fabrics that have been built and seen up to the present day appear as nothing in com- parison with the grandeur of this one. And it has been a very great loss that those whose duty it was did not put all their power into the undertaking, for the reason that, before death took away from us that rare man, we should have seen that beautiful and terrible structure already raised.

Up to this point has Michelagnolo carried the masonry of the work; and it only remains to make a beginning with the vaulting of the tribune, i of which, since the model has come down to us, we shall proceed toj. describe the design that he has left to the end that it may be carried out. He turned the curve of this vault on three points that make a triangle, in this manner:

A B 


The point C, which is the lowest, is the principal one, wherewith he turned the first half-circle of the tribune, with which he gave the form, height and breadth of this vault, which he ordered to be built entirely of bricks well baked and fired, laid herring-bone fashion. This shell he makes four palms and a half thick, and as thick at the top as at the foot, and leaving beside it, in the centre, a space four palms and a half wide at the foot, which is to serve for the ascent of the stairs that are to lead to the lantern, rising from the platform of the cornice where there are balusters. The arch of the interior of the other shell, which is to be wider at the foot and narrower at the top, is turned on the point marked B, and the thickness of the shell at the foot is four palms and a half. And the last arch, which is to be turned in order to make the exterior of the cupola, wider at the foot and narrowing towards the top, is to be raised on the point marked A, which arch turned, there remains at the top all the hollow space of the interior for the ascent of the stairs, which are eight palms high, so that one may climb them upright; and the thickness of that shell comes to diminish little by little, insomuch that, being as before four palms and a half at the foot, it decreases at the top to three palms and a half. And the outer shell comes to be so well bound to the inner shell with bonds and with the stairs, that the one supports the other; while of the eight parts into which the fabric is divided at the base, the four over the arches are left hollow, in order to put less weight upon the arches, and the other four are bound and chained together with bonds upon the piers, so that the structure may have everlasting life.

The stairs in the centre between one shell and the other are constructed in this form; from the level where the springing of the vault begins they rise in each of the four sections, and each ascends from two entrances, the stairs intersecting one another in the form of an X, until they have covered the half of the arch marked C, on the upper side of the shell, when, having ascended straight up the half of that arch, the re- maining space is then easily climbed circle after circle and step after step in a direct line, until finally one arrives at the eye of the cupola, where the rise of the lantern begins, around which, in accord with the diminution of the compartments that spring above the piers, there is a smaller range of double pilasters and windows similar to those that are constructed in the interior, as will be described below.

Over the first great cornice within the tribune there begin at the foot the compartments for the recesses that are in the vault of the tribune, which are formed by sixteen projecting ribs. These at the foot are as broad as the breadth of the two pilasters which at the lower end border each window below the vault of the tribune, and they rise, diminishing pyramidally, as far as the eye of the lantern; at the foot they rest on pedestals of the same breadth and twelve palms high, and these pedestals rest on the level platform of the cornice which goes in a circle right round the tribune. Above this, in the recessed spaces between the ribs, there are eight large ovals, each twenty-nine palms high, and over them a number of straight-sided compartments that are wider at the foot and narrower at the top, and twenty-four palms high, and then, the ribs drawing together, there comes above each straight-sided compartment a round fourteen palms high ; so that there come to be eight ovals, eight straight-sided compartments, and eight rounds, each range forming recesses that grow more shallow in succession. The ground of all these displays extraordinary richness, for Michelagnolo intended to make the ribs and the ornaments of the said ovals, straight-sided compartments, and rounds, all corniced in travertine.

It remains for us to make mention of the surface and adornment of the arch on that side of the vault where the roofing is to go, which begins to rise from a base twenty-five palms and a half high, which has at the foot a basement that has a projection of two palms, as have the crowning mouldings at the top. The covering or roofing with which he proposed to cover it is of lead, such as covers the roof of the old S. Pietro at the present day, and is divided into sixteen sections from one solid base to another, each base beginning where the two columns end, which are one on either side of it. In each of these sections, in the centre, he made two windows to give light to the inner space where the ascent of the stairs is, between the two shells, so that in all they are thirty-two. These, by means of brackets that support a quarter-round, he made projecting from the roof in such a manner as to protect the lofty and novel view-point from the rain. In a line with the centre of the solid base between each two columns, above which was the crowning cornice, sprang a rib, one to each, wider at the foot and narrowing at the top; in all sixteen ribs, five palms broad, in the centre of each of which was a quadrangular channel one palm and a half wide, within which is formed an ascent of steps about one palm high, by which to ascend or descend between the platform at the foot and the summit where the lantern begins. These are to be built of travertine and constructed with mor- tisings, to the end that the joins may be protected against water and ice during times of rain.

The design for the lantern is reduced in the same proportion as all the rest of the work, so that, taking lines round the circumference, every- thing comes to diminish in exact accord, and with proportionate measure- ments it rises as a simple temple with round columns two by two, like those on the solid bases below. These have pilasters to correspond to them, and one can walk all the way round and see from the central spaces between the pilasters, where the windows are, the interior of the tribune and the church. Above this, architrave, frieze, and cornice curve in a round, projecting over each pair of columns; and over these columns, in a line with them, spring some caulicoles, which, together with some niches that divide them, rise to find the end of the lantern, which, begin- ning to draw together, grows gradually narrower for a third of its height, in the manner of a round pyramid, until it reaches the ball, upon which, as the final crown of the structure, goes the cross. Many particulars and minute details I might have mentioned, such as air-holes for protection against earthquakes, water-conduits, the various lights, and other con- veniences, but I omit them because the work is not yet come to com-pletion, being content to have touched on the principal parts as well as I have been able. For, since every part is in existence and can be seen, it is enough to have made this brief sketch, which is a great light to him, who has no knowledge of the structure.

The completion of this model caused the greatest satisfaction not only to all his friends, but to all Rome, the form of the fabric having been thus settled and established. It then came to pass that Paul IV died, and after him was elected Pius IV, who, while causing the building of the little palace in the wood of the Belvedere to be continued by Pirro Ligorio, who remained architect to the Palace, made many gracious offers and advances to Michelagnolo. The Motu-proprio originally received by Michelagnolo from Paul III, and then from Julius III and Paul IV, in respect of the fabric of S. Pietro, he confirmed in his favor, and he restored to him a part of the revenues and allowances taken away by Paul IV, employing him in many of his works of building; and in his time he caused the fabric of S. Pietro to be carried on vigorously. He made use of Michelagnolo, in particular, in preparing a design for the tomb of the Marchese Marignano, his brother, which, destined to be erected in the Duomo of Milan, was allotted by his Holiness to the Chevalier Leone Leoni of Arezzo, a most excellent sculptor and much the friend of Michelagnolo; the form of which tomb will be described in the proper place.

At this time the Chevalier Leone made a very lively portrait of Michelagnolo in a medal, and to please him he fashioned on the reverse a blind man led by a dog, with these letters around:


And Michelagnolo, since it pleased him much, presented him a model in wax of Hercules crushing Antaeus, by his own hand, with certain of his designs. Of Michelagnolo we have no other portraits but two in painting, one by the hand of Bugiardini and the other by Jacopo del Conte, one in bronze executed in full-relief by Daniele da Volterra [Ricciarelli], and this one by the Chevalier Leone; from which portraits so many copies have been made, that I have seen a good number in many places in Italy and in foreign parts.

The same year Cardinal Giovanni de' Medici, the son of Duke Cosimo, went to Rome to receive the hat from Pius IV, and it fell to Vasari, as his servant and familiar friend, to go with him; which Vasari went there willingly and stayed about a month, in order to enjoy Michelagnolo, who received him with great affection and was always with him. Vasari had taken with him, by order of his Excellency, a model in wood of the whole Ducal Palace of Florence, together with designs of the new apartments that had been built and painted by him; which Michelagnolo desired to see both in the model and in the designs, since, being old, he was not able to see the works themselves. These works, which were abundant and well varied, with different inventions and fancies, began with the Castration of Uranus and continued in stories of Saturn, Ops, Ceres, Jove, Juno, and Hercules, each room having one of these names, with the stories in various compartments; even as the other chambers and halls, which were beneath these, had the names of the heroes of the House of Medici, beginning with the elder Cosimo, and continuing with Lorenzo, Leo X, Clement VII, Signer Giovanni, Duke Alessandro, and Duke Cosimo, in each of which were not only the stories of their actions, but also portraits of them, of their children, and of all the ancients renowned in statesmanship, in arms, and in letters, taken from the life. Of these Vasari had written a Dialogue in which he explained all the stories, the end of the whole invention, and how the fables above harmonized with the stories below; which was read to Michelagnolo by Annibale Caro, and he took the greatest pleasure in it. This Dialogue, when Vasari shall have more time, will be published.

The result of all this was as follows. Vasari was desirous of setting his hand to the Great Hall, and since, as has been said elsewhere, the ceiling was low, making it stunted and wanting in lights, he had a desire to raise that ceiling. Now the Duke would not make up his mind to give him leave that it should be raised; not that the Duke feared the cost, as was seen afterwards, but rather the danger of raising the beams of the roof thirteen braccia. However, like a man of judgment, his Excellency consented that the advice of Michelagnolo should be taken, and Michelagnolo, having seen in that model the Hall as it then was, and afterwards, all the beams having been removed and replaced by other beams with a new invention in the ceiling and walls, the same Hall as it has since been made, with the invention of the stories likewise designed therein, liked it and straightway became not a judge but a supporter, and the rather as he saw the facile method of raising the beams and the roof, and the plan for executing the whole work in a short time. Wherefore, on Vasari's return, he wrote to the Duke that he should carry out that undertaking, since it was worthy of his greatness.

The same year Duke Cosimo went to Rome with the Lady Duchess Leonora, his consort, and Michelagnolo, after the Duke's arrival, went straightway to see him. The Duke, after receiving him with many endearments, caused him, out of respect for his great genius, to sit by his side, and with much familiarity talked to him of all that he had caused to be done in painting and sculpture at Florence, and also of all that he was minded to have done, and in particular of the Hall; and Michelagnolo again encouraged and reassured him in that matter, lamenting, since he loved that Lord, that he was not young enough to be able to serve him. His Excellency said that he had discovered the way to work porphyry, a thing which Michelagnolo could not believe, and the Duke therefore sent him, as has been related in the first chapter of the Treatise on Theory, the head of Christ wrought by the sculptor Francesco del Tadda, at which he was astonished; and he visited the Duke several times the while that he stayed in Rome, to his vast satisfaction. He did the same a short time afterwards when the most Illustrious Don Francesco de' Medici, the Duke's son, went there, in whom Michelagnolo took much delight from the marks of regard and affection shown to him by his most Illustrious Excellency, who spoke with him always cap in hand, having infinite reverence for so rare a man; and Michelagnolo wrote to Vasari that it vexed him to be old and infirm, for he would have liked to do something for that Lord, but he was going about trying to buy some beautiful antique to send to him in Florence.

Being requested at this time by the Pope for a design for the Porta Pia, Michelagnolo made three, all fantastic and most beautiful, of which the Pope chose the least costly for putting into execution; and it is now to be seen erected there, with much credit to him. Perceiving the inclination of the Pope, and hoping that he would restore the other gates of Rome, he made many other designs for him; and he did the like, at the request of the same Pontiff, in the matter of the new Church of S. Maria degli Angeli in the Baths of Diocletian, in order to convert them into a temple for the use of Christians. A design by his hand prevailed over many others made by excellent architects, being executed with such beautiful considerations for the convenience of the Carthusian Friars, who have now carried it almost to completion, that it caused his Holiness and all the prelates and lords of the Court to marvel at the judgment of the lovely conceptions that he had drawn, availing himself of all the skeleton of those baths, out of which was seen formed a most beautiful temple, with an entrance surpassing the expectations of all the architects; from which he acquired infinite praise and honor. For that place, also, he designed for his Holiness a Ciborium of the Sacrament in bronze, cast for the most part by Maestro Jacopo Ciciliano, an excellent bronze-caster, who makes his works come out very delicate and fine, without any roughness, so that they can be polished with little labour; in which field he is a rare master, and gave much satisfaction to Michelagnolo.

The Florentine colony had often talked among themselves of giving a good beginning to the Church of S. Giovanni in the Strada Giulia. Finally, all the heads of the richest houses having assembled together, they each promised to contribute in due proportion according to their means towards that fabric, insomuch that they contrived to collect a good sum of money; and then it was discussed among them whether it were better to follow the old lines or to have something new and finer. It was determined that something new should be erected upon the old foundations, and finally they elected three men to have the charge of the fabric, who were Francesco Bandini, Uberto Ubaldini, and Tommaso de' Bardi; and these requested Michelagnolo for a design, recommending themselves to him on the ground that it was a disgrace to their colony to have thrown away so much money without any kind of profit, and that, if his genius did not avail to finish the work, they had no other resource. He promised them to do it, with as much lovingness as he had ever shown in any work in the past, because in this his old age he readily gave his attention to sacred things, such as might redound to the honour of God, and also from affection for his fellow-Florentines, whom he loved always. Michelagnolo had with him at this conference the Florentine sculptor Tiberio Calcagni, a young man very ardent to learn art, who, after going to Rome, had turned his mind to the study of architecture. Loving him, Michelagnolo had given him to finish, as has been related, the Pieta' in marble that he had broken, and, in addition, a head of Brutus in marble with the breast, considerably larger than life, to the end that he might finish it. Of this the head alone was carved, with certain most minute gradines, and he had taken it from a portrait of Brutus cut in a very ancient cornelian that was in the possession of Signer Giuliano Cesarino; which Michelagnolo was doing for Cardinal Ridolfi at the entreaty of Messer Donato Giannotti, his very dear friend, and it is a rare work.

Michelagnolo, then, in matters of architecture, not being able by reason of old age to draw any more or to make accurate lines, was making use of Tiberio, because he was very gentle and discreet; and thus, desiring to avail himself of him in such an undertaking, he laid on him the charge of tracing the plan of the site of the above-named church. That plan having been traced and carried straightway to Michelagnolo, at a time when it was not thought that he was doing anything, he gave them to understand through Tiberio that he had carried out their wishes, and finally showed them five most beautiful ground-plans of temples; which having seen, they marvelled. He said to them that they should choose one that pleased them, and they, not wishing to do it, left the matter to his judgment, but he insisted that they should decide of their own free will; wherefore they all with one accord chose the richest. This having been adopted, Michelagnolo said to them that if they carried such a design to completion, neither the Greeks nor the Romans ever in their times executed such a work; words that neither before nor afterwards ever issued from the mouth of Michelagnolo, for he was very modest. Finally it was agreed that the direction should be left entirely to Michelagnolo, and that the labor of executing that work should fall to Tiberio; with all which they were content, Buonarroti promising them that Tiberio would serve them excellently well. And so, having given the groundplan to Tiberio to be drawn accurately and with correct measurements, he drew for him the profiles both within and without, and bade him make a model of clay, teaching him the way to execute it so that it might stand firm. In ten days Tiberio executed a model of eight palms, which much pleased the whole Florentine colony, so that afterwards they caused to be made from it a model of wood, which is now in the residence of the Consuls of that colony; a thing as rare in its beauty, richness, and great variety, as any temple that has ever been seen. A beginning was made with the building, and five thousand crowns were spent; but the funds for the fabric failed, and so it was abandoned, at which Michelagnolo felt very great displeasure. He obtained for Tiberio the commission to finish under his direction, at S. Maria Maggiore, a chapel begun for Cardinal Santa Fiore; but it was left unfinished, on account of the death of the Cardinal, of Michelagnolo, and of Tiberio himself, the death of which young man was a very great loss.

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