Olstrup Church is a Romanesque church built around 1200. In the Middle Ages, the church was originally dedicated to St Lawrence. Built of red brick, the relatively small church first consisted of a Romanesque chancel and nave. It was later extended to the west in the Late Gothic period with a stepped gable. The chancel's cross-vaults and the round chancel arch may date from the church's original construction. The cross-vaults in the nave also seem to be older than the Gothic extension.
In 1936, Egmont Lind discovered frescos in the east vault of the nave which were dated to c. 1575. They present scenes of the Last Judgment. Christ is depicted sitting on a rainbow with his feet on the globe of the Earth, flanked by trumpet-playing angels and the 12 apostles. Some pre-Reformation features such as the lily and sword are included but there are no halos.
The carved pulpit from 1622 has figures of the apostles. The canopy is from c. 1675. On the north wall there is a figure of St Lawrence from c. 1300. There is a decorated font in Gotland limestone.
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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.