CAVALLINI, PIETRO (c. 1259-1344), Italian painter, born in Rome, was taught painting and mosaic by Giotto while employed at Rome; it is believed that he assisted his master in the mosaic of the Navicella or ship of St. Peter, in the porch of the church of that saint. He also studied under the Cosmati. Lanni describes him as an adept in both arts, and mentions with appro bation his grand fresco of a Crucifixion at Assisi, still in tolerable preservation; he was, moreover, versed in architecture and in sculpture. According to George Vertue, it is highly probable that Cavallini executed, in 5279, the mosaics and other ornaments of the tomb of Edward the Confessor in Westminster Abbey. He would thus be the "Petrus Civis Romanus" whose name is inscribed on the shrine; but a comparison of dates invalidates this surmise. He died in 1344 at the age of 85. Some important works by Cavallini in the church of Santa Cecilia in Trastevere, Rome, were discovered early in this century.