The Rudolf Oetker Hall is one of Germany's most important concert halls. Built in 1929–1930 according to plans by architects Tietmann and Haake, it offers excellent facilities for classical concerts in its large hall, which seats 1,561 people, and its small hall, which seats 296 people. When the hall was taken over by the Bielefeld Theater and Orchestra, the desire arose to create an additional performance space with a stage on the ground floor. With young musical theater, musical readings, and lounge concerts, the venue hopes to offer formats other than those in the two halls on the upper floor in the future, thereby appealing to a different audience. In addition, the installation of a new bar was intended to improve the previously inadequate catering facilities.
The design echoes the strict axiality of the building and places the stage and bar in the central axis of the former cloakroom area. Where once the view ended at the door to the artists' dressing room upon entering the building, the bar now attracts all the attention. Seating loosely grouped around the stage offers space for 160 visitors. The number of coat racks has been reduced and they have been arranged along the two long sides of the room. Curtains can be used to separate the cloakrooms from the bar and performance area. This creates a protected and introverted event space with good acoustics. The dark-painted ceiling enhances the atmosphere and highlights the existing round columns and the surrounding border.