[50] He sent a model in 1559. It is from this model that Vasari executed the much-criticised staircase of the Laurentian. In spite of faults it shows the rugged genius of Michelangelo, who seemed to enjoy making difficulties for himself. That breakneck staircase, conceived in such a dry, hard and complicated way, but strong and violent, and which ever seeks to accentuate the ascending lines, is certainly a product of the same spirit which created the Medici tombs. Besides it is well to note that the faults were emphasised by the manner in which Vasari carried it out. Michelangelo had recommended that the staircase be made of wood, but Cosmo held to the idea of building it in stone. [51] See in the edition of Michelangelo's poems by Carl Frey, "Die Dichtungen des Michelangelo Buonarroti," Berlin, 1897, the sonnets, CIX, LXXVI, XLV, etc. Vasari tells us that Michelangelo made a life-size drawing of Cavalieri, the only portrait which he ever made, for he had a horror of copying a living person unless they were of incomparable beauty. He adds that he made him beautiful presents, "many astonishing drawings, a Ganymede carried to Heaven by the eagle of Zeus, a Tityos with the vulture feeding on his heart, the fall of Phaeton and the chariot of the Sun into the Po, and a Bacchanale of children--all works of the rarest beauty and of such perfection that their like has never been seen." [52] From the monastery at Viterbo, July 20, 1542 or 1543. The letter bears this address: "Al mio più che magnifico et più che carissimo M. Michel Agnolo Buonarroti." (Carteggio de Vittoria Colonna. Published by Ermanno Ferrero and Giuseppe Müller, Turin, 1892, pp. 268, 269.) [53] Donate Giannotti, "De' giorni che Dante consumo nel cercare l'Inferno e 'l Purgatorio. Dialoghi." [54] Were I but he, born for like lingering pains Against his exile coupled with his good, I'd gladly change the world's best heritage. (Translation of J. A. Symonds.) [55] Capitolo di Francesco Berni a fra Sebastiano del Piombo. (Rime. Ed. Frey, p. 263.) [56] Canzone in lode di Michelagnolo Bonarroto. (See Frey, p. 7.) [57] A Frenchman who saw him at that time. [58] Letters of Michelangelo to Fattucci, March 7, 1551. [59] Rime. Ed. Frey, LXXXVIII, p. 93. [60] _Ibid._, C and CL, pp. 105, 106. [61] The work on the fortifications of Rome directed by Antonio da San Gallo dates from his reign and also the construction of the Capitol, the raising of the statue of Marcus Aurelius, the completion of the Farnese Palace, the construction of the Via Paola, of the Sala Regia and the Pauline Chapel at the Vatican, the Caffarelli and Spada palaces, the Villa Medici, etc. [62] As a matter of fact Michelangelo did not actually receive any income from this source until 1538, and after many difficulties he lost it in 1547. [63] Later on the subject was treated after the sketches of Michelangelo in the Chapel of S. Gregorio at Santa Trinità. (See Vasari.)