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 Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.