In the interior, the main attraction is the ambo of Guglielmo, a 12th-century pair of pulpits by one Master Guglielmo, originally sculpted for the cathedral of Pisa. It was taken to Cagliari in 1312 and placed in the nave, near to its third column. In 1669 it was split in two, and the two pulpits placed in their current locations. The four marble lions which supported the ambo are now located at the feet of the presbytery balustrade. Sculptures include scenes from the New Testament.
