His "School of Athens" covers one wall of the Stanza Della Segnatura, a room in the pope's private quarters
The Stanza della Segnatura was the 
first of the rooms to be decorated, and... [DOC] [TLE] The Papal Apartments of the Vatican Museums - ReidsItaly.com [PAR] The Stanza della Segnatura in Rome's Vatican, frescoed by Raphael ... Two of 
the papal suites really stand out (plus one private chapel once used by a pope): 
... of the Renaissance master's best works, including the renowned School of 
Athens.