Originally the church of a former Benedictine monastery, the present building began as a
Romanesque church of the 12th century. It has been the object of many attempts at beautification over the centuries, however, particularly since becoming a cathedral, and the original structure is overlaid by the many later works, largely of painted terracotta and stucco, such as the
Neoclassical west front. The crypt, which dates from the second half of the 10th century and is thus older than the main structure, is of especial interest, for its unusual arrangement of pillars, which divide the space into nine small aisles, and for the elaborately carved zoomorphic capitals of the pillars themselves. The crypt also contains a blood-stained stone said to come from the
Holy Sepulchre in
Jerusalem, whence the dedication. The cathedral also contains two
bas-reliefs credited to
Agostino di Duccio:
Tobias and the Angel and the
Victory of Saint Michael over the Dragon. ==References==