Second World War Reserve Civil Defence Control Centre, established at the former St. Mary's School, off Leith Park Road, Gravesend. Built by September/October, 1942, it was a reserve for the Control Centre at the Police Station in Windmill Street, Gravesend. In the event of the inability of the main control centre to function, it would have come into use as a command post for coordinating the local civil defence and rescue services in the event of the community suffering the effects of air bombardment. Details of construction are unknown, but it appears to have been an underground room or rooms created for the purpose. It would have been decommissioned in 1945 and was probably demolished at the same time as St. Mary's School in 1972.