Originally, "Castle Corsignano", Pienza took its present name in honor of Pope Pius II Piccolomini, which began in the second half of the fifteenth century, the restructuring that was meant to be the utopian ideal of the city. The whole village is a small gem, but in particular is the cathedral, which housed works by Giovanni di Paolo, Matteo di Giovanni Vecchietta, Sano di Pietro, and there is a marble altar attributed to Rossellino, the architect whom Pope Pius II commissioned to redesign the city. Next to the cathedral is the Diocesan Museum, where works from the school of Sodom and Sano di Pietro, Flemish tapestries of the '400 and '500. A short distance away is the beautiful Palazzo Piccolomini, built and designed by Bronzino and Beccafumi. Downstream of the enchanting village of "Natural and Cultural Artistic Park of the Val d'Orcia , with ravines, rolling fields and the famous chalk cliffs