The Trier Imperial Baths (Kaiserthermen) are a large Roman bath complex, designated as part of the UNESCO World Heritage Site. The impressive ruins of the baths, along with the derelict rooms and the walls of previous structures, are among the most important to have been discovered in Trier. Today a visit to the thermal baths, which can also be explored below ground, is like stepping back in time. The walls of the hot bath (caldarium) are deservedly part of this famous landmark in Trier. After the one in Rome, the Imperial Thermal Baths and St. Barbara Roman Baths were once among the largest bathing complexes in the Roman empire. They were built in the first and second centuries AD.
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.