The oldest parts of the Reerslev Church, nave and the chancel, date back to the 12th century and are in the Romanesque style. In the 15th century, a chapel, a vestry and an extension of the nave to the west were added in the late-Gothic style. Cross vaults were also added during this period.
The cross vaults were decorated by the Isefjord school around 1450. After the Reformation, they were covered with limewash for centuries until they were uncovered and partly restored by Jacob Kornerup in 1873. They present pictures of Christ's birth, the Three Kings, children being killed under Herod's orders, the flight to Egypt and the arrival in Jerusalem on Palm Sunday. There are also scenes of the Last Supper, Jesus praying in Gethsemane, Pilot washing his hands, the Crucifixion and the Resurrection.
The church's altar with its panels from 1590 and the pulpit from 1609 are also of interest.
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.