Pienza, a town in Tuscany, is the "touchstone of Renaissance urbanism." In 1996, UNESCO declared the town a World Heritage Site and in 2004 the entire valley, the Val d'Orcia, was included on the list of Unesco’s World Cultural Landscapes. Pienza was the birthplace of Aeneas Silvius Piccolomini, who would become Pope Pius II. After he became Pope, Piccolomini had the entire village rebuilt as an ideal Renaissance town that would serve as a retreat from Rome.