Ursus of Ravenna was a 4th-century bishop who served the city of Ravenna for twenty-six years. Born to a noble pagan family in Sicily, he eventually moved to Ravenna after converting to Christianity, which caused conflict with his relatives. Following the passing of Liberius III, he was elected to his episcopal position. He is primarily remembered for establishing the Ravenna Cathedral, a structure known as the Basilica Ursiana, which was built to honor his leadership.