Since the 14th century craftmen’s guilds were significant brotherhoods who drove interests of their members. The big guild of Tallinn was an union of wealthy merchants. Their base was the Great Guild Hall in downtown, opposite the church of Holy Spirit. The building itself was built in 1407-1410 and is a well-preserved sample of Medieval construction.
Today the Great Guild Hall houses a museum presenting Estonia's history from prehistoric times right up to the end of the 20th century. Films and interactive displays show how people here lived, fought and survived over the last 11,000 years.
References: Tallinn Tourism
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.