St Decuman's Church is on a very early Christian site and is dedicated to Saint Decuman. It was the 'bishop-house' of the cantref of Penfro and one of the seven principal churches in Dyfed under medieval Welsh law. It is constructed of rubble stone under a slate roof which carries a bellcote. The nave and chancel are possibly 13th century and the transept, chapel and tower 14th century.
The font, in the north porch, is 12th or 13th century; the nave has a small Norman font. The church contains a number of tombs and memorials, including two recesses and wall-mounted coffin lids. The oldest dated memorial is a 1716 baroque monument to F Powell of Greenhill. The pulpit and lectern are 19th century, and windows range from the 19th and 20th centuries, as recently as 1960.
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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.