The façade of the "Cattedrale di Santa Maria Assunta", as seen from the entrance of the neighbouring baptistery.

The construction of the cathedral began in 1107, but the works were damaged and the building process stopped after the earthquake in 1117. IN 1129 the construction resumed and most of the building was probably completed around 1170. Then many alterations and modifications of the building started. The façade was probably built in the late 13th century.