The high repute of the monks attracted many gifts; eleventh- and thirteenth-century mosaics remain, but of the ambitious ensemble of Cosmatesque inlay, only the polychrome stone paving remains. The abbey's possessions in lands were numerous and widespread, and in 1131 King Roger II of Sicily made the abbot Baron of Rossano with an extensive fief. Between the 12th and 15th centuries the monastery suffered from the continual strife of warring factions: Romans and Tusculans, Guelphs and Ghibellines, popes and antipopes, Colonna and Orsini.