Complex sentence: The priory buildings stood at the centre of a walled precinct arranged in two courts, inner and outer with gatehouses at the entrances to both; the remains of the great gate of the inner court are extant but the outer gatehouse no longer survives.
Split into simpler sentences: The priory buildings stood at the centre of a walled precinct arranged in two courts, inner and outer. Gatehouses stood at the entrances to both courts; the remains of the great gate of the inner court are extant but the outer gatehouse no longer survives.