Cavallini, Pietro (active 1273-1308). Italian painter and mosaic designer, active mainly in Rome, where he must have been the leading artist of his day. His two major surviving works are mosaics of the Life of the Virgin (Sta Maria in Trastevere, signed and dated 1291) and a fragmentary fresco cycle, the most important part of which is a Last Judgement (Sta Cecilia in Trastevere, Rome).