Complex sentence: Its manor belongs to the bishops of Saint David's, who had formerly a residence or bishop's palace there, of which some ruins still remain and incorporate a double-sided vaulted well, known as Bishop Gower's Well.
Split into simpler sentences: Its manor belongs to the bishops of Saint David's, who formerly had a residence or bishop's palace there, of which some ruins still remain. These incorporate a double-sided vaulted well, known as Bishop Gower's Well.