Pienza

Pienza, a town and commune in the province of Siena, in the Val d'Orcia in Tuscany (central Italy), between the towns of Montepulciano and Montalcino, 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.

Palazzo Piccolomini
The trapezoidal-shaped piazza is defined by four buildings. The principal residence, Palazzo Piccolomini, is on the west side. It has three stories, articulated by pilasters and entablature courses, with a window set within each bay. This structure is similar to Alberti's Palazzo Rucellai in Florence and other later palaces. Noteworthy is the internal court of the palazzo. The back of the palace, to the south, is defined by loggias on all three floors that overlook an enclosed giardino all'Italiana and spectacular views into the distant landscape of the Val d'Orcia.
The Duomo
The Duomo (Cathedral), which dominates the center of the piazza, has a façade that is one of the earliest designed in the Renaissance manner. Though the tripartite division is conventional, the use of pilasters and of columns, standing on high dados and linked by arches, was novel for the time. The bell tower, however, has a Germanic flavor as is the layout of the Hallenkirche plan, a "triple-nave" plan where the side aisles are almost as tall as the nave; Pius, before he became pope, served many years in Germany and praised the effects of light admitted into the German hall churches in his Commentari.[2] Artworks in the duomo include five altar paintings from the Sienese School. The Baptistry, dedicated as usual to San Giovanni, is located next to the apse of the church.
Palazzo Borgia
Pius encouraged his cardinals to build palazzi to complete the city. The Palazzo Borgia, on the third side of the piazza, was built as the palace to house the bishops who would travel to Pienza to attend the pope. It is now home to the Diocesan Museum, and the Museo della Cattedrale. The collection includes local textile work as well as religious artifacts. Paintings include a 7th century painting of Christ on the Cross (La Croce), 14th century works by Pietro Lorenzetti (Madonna with Child) and Bartolo di Fredi (Madonna della Misericordia). There are also important works from the 14th and 15th centuries, including a Madonna attributed to Luca Signorelli.
Palazzo Comunale
Across from the church is the town hall, or Palazzo Comunale. Since Corsigniano was originally a village without a town governance, before the transformations there was no town hall. But when Corsigniano was given the status of an official city, a Palazzo Comunale was required, though it was certainly more for show than anything else. It has a loggia on the ground floor and council chamber above; a third floor was added in 1599 (Mack 1987). It also has a brick bell tower that is shorter than its religious counterpart, to symbolize the superior power of the church. The Palazzo Comunale was probably also designed by Rossellino.

The travertine well in the Piazza carries the Piccolomini family crest, and was widely copied in Tuscany during the following century.