Hogrän Church consists of a Romanesque tower and a Gothic nave and choir. The tower thus is the oldest part of the church, dating from circa 1200. Attached to it was originally an earlier stone church, also Romanesque in style and erected during the 12th century. During the 14th century, it was however replaced by the presently visible Gothic nave and choir. A few details from this earlier church, such as a few sculpted reliefs and a Romanesque window-frame, have been incorporated in the Gothic church.
The interior of the church is characterised by the broad width of the nave (10 metres). The church contains a number of medieval items. The triumphal cross is one of the oldest wooden sculptures from Gotland, dating from the 12th century. The finely carved doors of the tabernacle are from the early 15th century, and the door of the sacristy is likewise medieval. The baptismal font, probably a work by the craftsman or workshop known as Master Byzantios, is from the late 12th century. Of later date are the altarpiece (1634), the pulpit (1637) and the choir stalls (17th century but with incorporated medieval elements).
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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.