BAROCCHIO or BAROZZI, GIACOMO, called DA VIGNOLA (1507-1573), Italian architect, was born at Vignola in the Modenese territory on Oct. 1, 1507, and died in Rome on July 7, In 1564 he succeeded Michelangelo as the architect of St. Peter's, and executed various portions of that fabric, besides a variety of works in Rome. The designs for the Escorial were also supplied by him. He is the author of a work on the Five Orders of Architecture (Rome, 1563), and another on Practical Perspective (Rome, 1583) .