Stadttheater Rüsselsheim, Theater in Rüsselsheim am Main, Germany

Stadttheater Rüsselsheim is a listed theatre building designed by Dietrich Hirsch, a pupil and later colleague of Hans Scharoun. Its plan is formed by two interlocking, opposing parabolas whose roofs slope in opposite directions; the rear section's apex pierces the front roof, creating a dormer with a slit window nicknamed the "shark's mouth". Inside are a main hall with orchestra pit and 865 seats on parterre and rang, plus a studio stage with 140 seats.

The theater opened on 6 September 1969 with Verdi's La traviata. Architect Dietrich Hirsch, a pupil and later colleague of Hans Scharoun, designed the building. In 2025 the Hessian State Office for Monument Preservation listed it as a cultural monument for historical, artistic and urban-planning reasons.

The building's nickname, "Haifischmaul" (shark's mouth), comes from the slit-like window in the dormer where the rear roof pierces the front facade. Since 1994 the Rüsselsheimer Filmtag, a festival of satirical short films, has been held here, and the Jazz-Fabrik Rüsselsheim organizes concerts with renowned musicians. The Classic-Café series in the foyer is performed by ensembles from the Frankfurt University of Music and Performing Arts.

The venue is easily accessible by public transportation and offers parking nearby for those traveling by car. It is advisable to book tickets in advance, especially for popular shows, to ensure good seating options.

The rear roof ridge pierces the front facade and forms a dormer whose slit-like window earned the building the nickname "Haifischmaul" (shark's mouth). The design comes from Dietrich Hirsch, a pupil and later colleague of Hans Scharoun; the plan is built from two interlocking, opposing parabolas.