Named after the river that runs through it, is the chief town of the Chianti Classico wine zone and home to Chianti's largest wine fair, held every September. In 1325 the fortified town of Greve was burned to the ground by Castruccio Castracani, the Duke of Lucca. Nevertheless, Greve expanded considerably during the 14th and 15th centuries, and, after the unification of Italy, became the most important centre of the Greve valley. The rebuilt church of Santa Croce, which houses some beautiful paintings of the school of Fra Angelico, stands at the top of the asymmetrical main piazza . The original piazza is shown as square in old documents but the construction of buildings, porticoes and loggias has encroached on it over the years so that it is now triangular, pointing to the neoclassical facade of Santa Croce. On one side of the piazza is a statue of the explorer Giovanni da Verrazano who discovered New York Harbour. A house associated with the family of Amerigo Vespucci is located in nearby Montefioralle.