The Collegiate Church of Santa Maria Assunta, San Gimignano is a Roman Catholic collegiate church and minor basilica located in San Gimignano, Tuscany, central Italy, situated in the Piazza del Duomo at the town's heart. The church is famous for its fresco cycles which include works by Domenico Ghirlandaio, Benozzo Gozzoli, Taddeo di Bartolo, Lippo Memmi and Bartolo di Fredi.