Begun as a three-aisle hall church at about the same time as the town Ribnitz was founded, the oldest pre-Romanesque parts of the St. Mary's Church are located in the western outer wall of the building. Pilister corner strips, a rounded frieze and lanset windows are amongst other remanents of this first church.
In the 14th century, the church was enlarged by the addition of two bays, and decorated by the addition of peaked arch portals in the north of south of these. After a 1455 fire, the building was rebuilt with a pentagonal choir bay and a massive ornamental helm on the top of the spire. The Great fire of 1759 destroyed this ornamental helm, as well as the building's vaulting and medieval interior. Under instruction of the court masterbuilder Johann Jachim Busch of Ludwigsluster, the tower's roof and its interior was rebuilt in a Gothic style.
The centre aisle of the church was distinguished from this time on by a semi-circular barrel-shaped timber supports, the side-aisles by a flat wooden roof. Busch envisaged a pulpit alter, and after the pulpit was relocated into the church nave, the alter was completed with the addition of the Ludwigluster court painter J.H. Surlandt; the image is a copy of Annibale Carraci's 'The Burial of Christ'. The church's northern and southern side-chapels were never restored due to insufficient funds, with the foundations also removed. Between 1841 and 1843, Georg Adolph Demmler oversaw the addition of a latern to the of a Baroque-style tower crown, heighening the tower, which still offers a sightseeing platform to visitors. In the 1970s, the church was threatened by structural damage, losing once more much of its interior: the 1883 organ, built by Friese of Schwerin, was removed. After 1980, the church was renovated, the interior again altered and a winter church on the site added.
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.