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 Odeon of Herodes Atticus is a stone theatre structure located on the southwest slope of the Acropolis of Athens. It was built in 161 AD by the Athenian magnate Herodes Atticus in memory of his wife, Aspasia Annia Regilla. It was originally a steep-sloped theater with a three-story stone front wall and a wooden roof made of expensive cedar of Lebanon timber. It was used as a venue for music concerts with a capacity of 5,000. It lasted intact until it was destroyed and left in ruins by the Heruli in 267 AD.
The audience stands and the orchestra (stage) were restored using Pentelic marble in the 1950s. Since then it has been the main venue of the Athens Festival, which runs from May through October each year, featuring a variety of acclaimed Greek as well as International performances.