Basilica of Sant'Apollinare Nuovo, Ravenna (Italy). Detail of the mosaic of the nave: : la procession des Vierges martyres. Detail : Saint Pelagia.. 6th century.. The Basilica is one of the Roman Catholic building in Byzantine style built in the early 6th century by Theodoric the Great, near its palace. It was used as a palatine church and was then dedicated to the Savior.