Cilgerran Castle (Welsh: Castell Cilgerran) is a 13th-century ruined castle located in Cilgerran, near Cardigan. The first castle on the site was thought to have been built by Gerald of Windsor around 1110–1115, and it changed hands several times over the following century between English and Welsh forces. In the hands of William Marshal, 2nd Earl of Pembroke, the construction of the stone castle began after 1223.
After passing through successive families, it was left to ruin and eventually abandoned by 1400. The castle backs onto a cliff face, with the remaining ruins dating from the 13th century. It was most heavily fortified where it faces inland, and includes a pair of drum towers, rather than a central keep, which remain standing. It passed into the hands of the National Trust in 1938, who open it to the public.
References: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.