Until 1527 Michelangelo worked away at the building and the tombs, always secretly, behind impenetrable barriers; and then came the troubles which led to the siege of Florence, following upon the banishment of Alessandro, Duke of Urbino, natural son of the very Lorenzo whom the sculptor was to dignify for all time. By the Emperor Charles V and Pope Clement VII the city was attacked, and Michelangelo was called away from Clement's sacristy to fortify Florence against Clement's soldiers. Part of his ramparts at S. Miniato still remain, and he strengthened all the gates; but, feeling himself slighted and hating the whole affair, he suddenly disappeared. One story is that he hid in the church tower of S. Niccolò, below what is now the Piazzale dedicated to his memory. Wherever he was, he was proclaimed an outlaw, and then, on Florence finding that she could not do without him, was pardoned, and so returned, the city meanwhile having surrendered and the Medici again being restored to power. The Pope showed either fine magnanimity or compounded with facts in the interest of the sacristy; for he encouraged Michelangelo to proceed, and the pacific work was taken up once more after the martial interregnum, and in a desultory way he was busy at it, always secretly and moodily, until 1533, when he tired completely and never touched it again. A year later Clement VII died, having seen only drawings of the tombs, if those. But though left unfinished, the sacristy is wholly satisfying--more indeed than satisfying, conquering. Whatever help Michelangelo may have had from his assistants, it is known that the symbolical figures on the tombs and the two seated Medici are from his hand. Of the two finished or practically finished tombs--to my mind as finished as they should be--that of Lorenzo is the finer. The presentment of Lorenzo in armour brooding and planning is more splendid than that of Giuliano; while the old man, whose head anticipates everything that is considered most original in Rodin's work, is among the best of Michelangelo's statuary. Much speculation has been indulged in as to the meaning of the symbolism of these tombs, and having no theory of my own to offer, I am glad to borrow Mr. Gerald S. Davies' summary from his monograph on Michelangelo. The figure of Giuliano typifies energy and leadership in repose; while the man on his tomb typifies Day and the woman Night, or the man Action and the woman the sleep and rest that produce Action. The figure of Lorenzo typifies Contemplation, the woman Dawn, and the man Twilight, the states which lie between light and darkness, action and rest. What Michelangelo--who owed nothing to any Medici save only Lorenzo the Magnificent and had seen the best years of his life frittered away in the service of them and other proud princes--may also have intended we shall never know; but he was a saturnine man with a long memory, and he might easily have made the tombs a vehicle for criticism.