Monsummano Terme is an comune located in the Province of Pistoia, Tuscany, central Italy. It is located in the Valdinievole, and is a popular spa resort. It is composed of two separate nuclei: Monsummano Alto, of Etruscan origins and with a castle and a line of walls, overlook the lower Monsummano, built starting from 1602 around a sanctuary commissioned by Ferdinand I, Grand Duke of Tuscany. It was the birthplace of French actor Yves Montand and Italian poet Giuseppe Giusti.