Piazza Pio II As mentioned earlier, the architect Bernardo Rossellino was appointed to transform the town, designing and building the main cathedral square, the town hall and the papal palace. In order to highlight the palaces and churches, in the limited space, an asymmetrical geometric shape was designed. The Pius II Square is an irregular trapezoid, which constitutes the center and focal point of the city. Lonely Planet wrote that if it is on the square Rotate 360 degrees, you can appreciate all the treasures of the Renaissance in Pienza. Palazzo Piccolomini on the west side of Piazza Pius II, and the country residence of Pope Pius II. Palazzo Vescovile on the east side of Piazza Pius II. Palazzo Vescovile. The town hall on the north side of Piazza II has a conspicuous jagged bell tower.