The Bielefeld Opera is the venue of Städtische Bühnen Bielefeld (Municipal Theatre Bielefeld) in Bielefeld, Germany. It is a Dreisparten Haus (three-department house), offering plays, music (opera, musical theatre), and ballet. The main performance venue is the Stadttheater am Niederwall (Municipal Theatre at the Lower Wall), built in 1904 and extensively renovated from 2004 to 2006. It is the largest theater in East Westphalia, offering 500 performances annually. It is under the direction of Michael Heicks; its resident orchestra is the 72-member Bielefeld Philharmonic Orchestra that also performs symphonic concerts at the Rudolf-Oetker-Halle.
Plans to build an opera house in Bielefeld were laid in 1885 by a foundation set up the widow of the founder of the Crüwell Tobacco Company. Bernhard Sehring was chosen as architect and construction was started in 1901 on the Niederwall. The Art Nouveau building was inaugurated with a performance of Carl Maria von Weber's Der Freischütz on April 3, 1904.