Having the character of a kind of architecturaldecoration which had its origin in the Byzantinework of southern Italy and Sicily, and is characterized by extreme lightness and delicacy and a lavish use of marblemosaics, the materials for which were taken from the ruins of Rome, “Arte marmoris periti.” The style was not confined to the Cosmati, one of the most perfect examples being the cloister of S. Giovanni in Laterno (Rome) by Vassallectus. (Sturgis, 1900)