Complex sentence: The whole site was arranged around a central cloister from which only the east wall and west wall of the chapter house remain, the sacristy, refectory, chapter house, lady chapel and parlour having been demolished.
Split into simpler sentences: The whole site was arranged around a central cloister from which only the east wall and west wall of the chapter house remain. The sacristy, refectory, chapter house, lady chapel and parlour having been demolished.