During the 13th century Prussian Crusade, the current Gvardeysk area was conquered by the Teutonic Knights. To protect Samland from the Nadrovians and Scalovians, the crusaders built a wooden fort between the Deime and Pregel rivers from 1283–90. This was replaced by Tapiau Castle, a stone Ordensburg, in 1351. Vytautas, forthcoming grand duke of Lithuania was baptised here in 1383 after he breached of Krėvė prison. Since 1450 town and castle was named Tapiau. After Teutonic state was downed by Poland and Lithuania, Teutons moved order archives to Tapiau castle and kept it during 1469-1722. Later Tapiau castle was abbandoned. Soviets built a jail on the mound, it remains active.
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.