The Uffizi Palace was commissioned by Cosimo I de' Medici and designed by Vasari (16th Century). It has a unusual U shape, which is closed towards the Arno. The two wings of the palace are connected by a corridor with six big arched windows, facing the Arno and the inner courtyard. Nowadays the building hosts the Uffizi Gallery, one of the most visited museums in the world, collecting masterpieces from the 13th to the 18th Century. The very beginning of the Uffizi Gallery was the collection of Francesco I de' Medici; The collection became “public and inalienable good” thanks to Duchess Anna Maria Luisa de' Medici whose will it was that it would be open to the public forever. Today, the Uffizi Gallery is one of the most important museums in the world, with new acquisitions and gifts. Using the elevator at the entrance of the museum is reserved for people who have special needs – including temporary – and the maximum capacity is 6 persons at a time.