The Lonja de la Seda or Llotja de la Seda (Silk Exchange) is a late Valencian Gothic-style civil building in Valencia. It is a principal tourist attraction in the city and UNESCO World Heritage Site.
Built between 1482 and 1533, it is an exceptionally well-preserved example of a secular building in late Gothic style of outstanding artistic value. It bears eloquent witness to the role played in the Mediterranean and far beyond by the merchants of the Iberian Peninsula in the 15th and 16th centuries.
la Lonja is composed of three parts. The main hall, Sala de Contratación (The Trading Hall), is a large lavishly decorated space supported by gorgeous twisted columns. This was the financial centre of La Lonja, where the merchants work out contracts. The side-wing is named the Pavilion of the Consulate, and this was the seat of the Tribunal del Mar - the first marine merchant tribunal to ever be formed in Spain. The first two floors were the main function rooms, with the upper one hosting a richly decorated ceiling. These rooms are still maintained original furnishings. On occasion, the Tribunal would imprison merchants for debts in the central tower of La Lonja - the third part of the structure.
In addition to being a very representative example of medieval places of commerce, the building incorporates elements of the new architectonic language that developed in Europe at the end of the 15th century incorporating the most daring progress in the field of construction techniques (admirable twisted columns and vaults of remarkable complexity, all in freestone of the highest quality).
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.