text: Churches Santa Maria della Pieve: the most striking feature of this Romanesque church is the massive, square-planned bell tower with double orders of mullioned windows. The church was built in the 12th century over a pre-existing Palaeo-Christian edifice, and was renovated a century later with the addition of the characteristic façade made of loggias with small arches surmounted by all different-styled columns. Also from the same century is the lunette with the Virgin between Two Angels and the sculptures of the months (1216) over the main portal. the interior has a nave and two aisles, with a transept also added in the 13th century. In the following century chapels, niches and frescoes were added, including the polyptych of Virgin with Child and Saints by Pietro Lorenzetti (1320). In the crypt is a relic bust of St. Donatus (1346). From the same epoch is the hexagonal baptismal font, with panels of the Histories of St. John the Baptist, by Giovanni di Agostino. The Pieve was again renovated by Giorgio Vasari in 1560.
  Cathedral of Saint Donatus (13th – early 16th centuries): the façade of this Gothic style church remained unfinished, and was added in the 20th century.  The interior has a nave and aisles divided by massive pilasters. The left aisle has a fresco by Piero della Francesca portraying the Madeleine. Noteworthy are also the medieval stained glass, the Tarlati Chapel (1334) and the Gothic tomb of Pope Gregory X.