The Palazzo di Venezia (formerly Palace of St. Mark) is a palazzo (palace) in central Rome, Italy, just north of the Capitoline Hill. The original structure of this great architectural complex consisted of a modest medieval house intended as the residence of the cardinals appointed to the church of San Marco. In 1469 it became a residential papal palace, having undergone a massive extension, and in 1564, Pope Pius IV, to win the sympathies of the Republic of Venice, gave the mansion to the ambassadors of La Serenissima on condition that a part of the building should be kept as a residence for the cardinals—the Apartment Cibo—and that the Venetian Republic should provide for the building's maintenance and future restoration. The palazzo faces Piazza Venezia and Via del Plebiscito. It currently houses the National Museum of the Palazzo Venezia.