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 Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.