Wilhelmsburg was built from 1842 to 1849 as the Citadel's reduit. The Citadel comprised work XII of the Wilhelmsburg and works XIII to XVIII of Fort Wilhelm and was the largest of the town-wall fortifications. In contrast to all the other works; the ›Wilhelmsburg‹ had no ramparts and consisted only of four re-inforced bunkers in the three towers. Over the decades, different regiments and units were stationed here.
After the Second World War, the Wilhelmsburg was officially used as a refugee camp, although several citizens of Ulm, whose homes had been bombed or requisitioned, also took shelter here. At any one time, a total of almost 3,000 people lived in the ›Wilhelmsburg‹, which had its own shop, post office and school.
In 1956, the newly formed German army moved in and up until 1970, soldiers were still stationed in the bunkers of the Wilhelmsburg.
Since then, the more than 570 rooms have been empty, apart from a few that have been rented out to companies.
References:The Broch of Clickimin is a large and well preserved, though somewhat restored broch near Lerwick. Originally built on an island in Clickimin Loch (now increased in size by silting and drainage), it was approached by a stone causeway. The water-level in the loch was reduced in 1874, leaving the broch high and dry. The broch is situated within a walled enclosure and, unusually for brochs, features a large 'blockhouse' between the opening in the enclosure and the broch itself. Another unusual feature is a stone slab featuring sculptured footprints, located in the causeway which approached the site. Situated across the loch is the Clickimin Leisure Centre.