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Pirro Ligorio (ca 1510-1583) was an Italian mapmaker, artist, and administrator. In 1534, he was appointed superintendent of ancient monuments for Popes Pius IV and Paul IV. Ligorio was a skilled painter and architect; his best known building work was as head of the team that finished the cupola of Saint Peter's Basilica in the Vatican. He fell out with Pius V and left Rome for Ferrara, where he died in 1583.