Michelozzo enjoyed a close relationship to Cosimo dei Medici throughout his life, and according to Giorgio Vasari in "The Lives of the Most Excellent Painters, Sculptors, and Architects, from Cimabue to Our Times", was motivated by his great love and fidelity for Cosimo to accompany him into exile in Venice from 1433 to 1434. Historians have cited this as an unparalleled example of esteem between artist and patron. Vasari also claimed that Michelozzo built the library of San Giorgio Monastery in 1434 for Cosimo, though this claim contradicts the original description and documents of the library, which indicate that although the library's construction was started by Cosimo, it was largely built under the direction of Medici bank manager Giovanni d'Orino Lanfredini between 1467 and 1478, which was well after Michelozzo's departure from Venice.