The Bayreuth Festspielhaus or Bayreuth Festival Theatre (German: Bayreuther Festspielhaus, pronounced [ˈbaɪ̯ʁɔʏ̯tɐ ˈfɛstʃpiːlˌhaʊ̯s]) is an opera house north of Bayreuth, Germany, dedicated solely to the performance of operas by the 19th-century German composer Richard Wagner. It is the venue for the annual Bayreuth Festival, for which it was specifically conceived and built. Its official name is Richard-Wagner-Festspielhaus.
Wagner adapted the design of the Festspielhaus from an unrealised project by Gottfried Semper for an opera house in Munich, without the architect's permission, and supervised its construction. Ludwig II of Bavaria provided the primary funding for the construction. The foundation stone was laid on 22 May 1872, Wagner's 59th birthday. The building was first opened for the premiere of the complete four-opera cycle of Der Ring des Nibelungen (The Ring of the Nibelung), from 13 to 17 August 1876.
Only the entry façade exhibits the typical late-19th-century ornamentation, while the remainder of the exterior is modest and shows mostly undecorated bricks. The interior is mainly wood and has a reverberation time of 1.55 seconds. The Festspielhaus is a carpenter's building; in fact, it is the largest free standing timber structure ever erected. Unlike the traditional opera house design with several tiers of seating in a horse-shoe shaped auditorium, the Festspielhaus's seats are arranged in a single steeply-shaped wedge, with no galleries or boxes. This is also known as continental seating. Many contemporary movie theaters have adopted this style of seating, which gives every seat an equal and uninterrupted view of the stage. The capacity of the Festspielhaus is 1,925 and has a volume of 10,000 cubic metres.