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Antonio da Sangallo (b. Florence, Italy 1483; d. Florence, Italy 1546) 

     
     
Antonio da Sangallo was born in Florence in 1483. Trained by his uncles, Giuliano da Sangallo and Antonio da Sangallo the Elder (1455-1534), he joined the family design, engineering and sculpture business. In 1503 he accompanied Giuliano to Rome where he remained and enjoyed the patronage of several popes. 

Sangallo succeeded Raphael as master of works on St. Peter's Basilica in 1520. The efficient infrastructure of the Sangallo business allowed him to take on commissions for a large number of clients while he continued to devote a large portion of his energies on St. Peter's. 

Although Sangallo was often viewed as more of a builder and engineer than an artist, he resisted the "mannerism" with which so many of his contemporaries attempted to emulate Michelangelo. 

Sangallo died in Florence in 1546. 

References
Dennis Sharp. The Illustrated Encyclopedia of Architects and Architecture. New York: Quatro Publishing, 1991. ISBN 0-8230-2539-X. NA40.I45. p133.