The original architect's successor, Buontalenti, added a cosmological structure to it called the Tribuna Octagonnale.  
The original architect's successor, Buontalenti, added a cosmological structure to it called the Tribuna Octagonnale.  Created from a series of pre-existing structures, it consists of a long series of porticoes with a mezzanine and another series of porticoes on top.  Its center cortile, which separates its two wings, gives the impression of a small European street and opens to the Arno River. Designed at the request of Cosimo de' Medici's son, Anna Maria Ludovica bequeathed many of its contents, which currently include The Battle of San Romano and The Birth of Venus. For 10 points, name this building designed by Giorgio Vasari, a former palace that is now an art museum in Florence.
The original architect's successor, Buontalenti, added a cosmological structure to it called the Tribuna Octagonnale.  
Uffizi Gallery [or Palazzo delgi Uffizi]