Piero or Pietro Strozzi (1510 Thionville, June 21, 1558) was an Italian leader, member of the family patrician Florentine Strozzi, son of Filippo Strozzi and Clarice de Medici, arch enemy of Cosimo I de’ Medici, the 20 / July / 1554 camped and strengthened himself with his soldiers to Colle Pionta. This was the last episode, but the serious consequences for the fate of Pionta. In fact, 20 / October / 1561, Cosimo I de ‘Medici began the destruction of the Old Cathedral and the entire medieval citadel.