This Neo-Roman style cathedral houses an ambulatory, and some beautiful early Niçois paintings. The great retable de Saint-Nicolas, with its 17 compartments in bright colours is the work of Louis Bréa (16C), and is similar to the retable named the Pietà du curé Teste, above the sachristy. The church houses an interesting marble altar incrusted with a mosaïc and copper and in the chapel an elegant Renaissance altar from the Spanish school.