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AntoniodaSangallo the Younger (or Antonio Cordiani) (April 12, 1484 - August 3, 1546) was an Italian architect active during the Italian Renaissance.
Antonio also built the Cappella Paolina and other parts of the Vatican, together with additions to the walls and forts of the Leonine City.
Antonio also constructed the very deep and ingenious rock-cut well at Orvieto, formed with a double spiral staircase, like the Well of Saladin in the citadel of Cairo.
His father Francesco Giamberti was a woodworker, and his brother Giuliano daSangallo and nephew AntoniodaSangallo the Younger were architects.
He also built a palace in the same city, various churches and palaces at Monte San Savino, and at Florence a range of monastic buildings for the Servite monks.
Antonio retired early from the practice of his profession, and spent his latter years in farming.