 Even today, Mandanici's historical cultural importance is attested by the duomo, with its frescoes and amazing wooden roof and terracotta columns from local sources; by the remains of the abbey of San Basilio, which was erected at the impetus of Roger II (1100) to be a centre of international study, gatherings and religion; and by the works of art like the canvas and plaster crucifix from 1600 in the church of SS.Trinità la Madonna del Cesto, the paintings of Subba, and the Norman churches.Another monument of historical value is the church of SS.