sentences:  Rome began to extend its sphere of influence over Calabria, Sila included, to the extent that any outside rule affected these mountains.Later it was nominally occupied in turn by the Ostrogoths, the Byzantines and, from the 11th century, the Italo-Normans.The last favoured the creation of several monasteries, such as Santa Maria della Matina of San Marco Argentano, Sambucina at Luzzi and Florense Abbey at San Giovanni in Fiore, founded by Joachim of Fiore.