Saint-Omer Cathedral is a Roman Catholic former cathedral, a minor basilica. It was formerly the seat of the Bishop of Saint-Omer, but the see was not restored after the French Revolution, being instead absorbed into the Diocese of Arras under the Concordat of 1801. The church is still commonly referred to as the 'cathedral' however.
The cathedral is an excellent example of the flamboyant style of gothic architecture of the 13th, 14th and early 15th centuries. The substantial, square tower (15th-16th century) is reminiscent of perpendicular gothic towers in England, such was the cross-over of architectural styles in the period. A 12th century octagonal tower also survives from an earlier building. Despite the length it took to construct, the overall effect is remarkably harmonious and uniform, in part because of the use of the distinctive local white limestone.
The church is also well-known for its sculpture and furnishings. The highlight is the "Descent from the Cross" by Rubens, but it also has a working astrological clock from 1558, some stained glass from the 15th century, the tomb effigy of Saint Omer himself (13th century) and interestingly, a statue of God from Therouanne, dated to around the 13th century: his strange proportions reflect the original intention to place it 60ft from the ground. Both south and west doors have interesting decorative sculptures, including a 13th century Doom on the south door.
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.