Palazzo Medici Riccardi, designed by Michelozzo di Bartolomeo for Cosimo il Vecchio, of the Medici family, is another major edifice, and was built between 1445 and 1460. It was well known for its stone masonry that includes rustication and ashlar. Today it is the head office of the Metropolitan City of Florence and hosts museums and the Riccardiana Library. The Palazzo Strozzi, an example of civil architecture with its rusticated stone, was inspired by the Palazzo Medici, but with more harmonious proportions. Today the palace is used for international expositions like the annual antique show (founded as the Biennale dell'Antiquariato in 1959), fashion shows and other cultural and artistic events. Here also is the seat of the Istituto Nazionale del Rinascimento and the noted Gabinetto Vieusseux, with the library and reading room.