Theater Koblenz, Classical theatre in Koblenz, Germany.

Theater Koblenz is a multi-arts theatre in Koblenz with its own drama, music theatre, puppetry and ballet ensembles, housed in an 18th-century building near the Electoral Palace. Its neoclassical facade with pilasters carries the Latin inscription "Musis Moribus Et Publicae Laetitiae Erectum MDCCLXXXVII". Inside, a three-storey horseshoe-shaped tier arrangement surrounds the blue, grey and white auditorium, which seats 500.

The building was completed in 1787, designed by architect Peter Joseph Krahe on commission from Clemens Wenzeslaus of Saxony, Elector and Archbishop of Trier. It is one of the oldest surviving theater buildings in this part of Germany.

Theater Koblenz brings together people from across the region for opera, theater and ballet performances. The horseshoe shape of the main hall means the stage is visible from nearly every seat, making it a place where the audience feels close to the action.

The theatre stands on Deinhardplatz, where the Clemensbrunnen fountain has stood in front of it since 1970. Besides the main house, performances also take place on rehearsal stages 2 and 4 and at Festung Ehrenbreitstein during the summer. The main entrances to the auditorium lie behind a Doric colonnade.

The flat hall ceiling only appears to be a dome: it is illusionistic painting with perspective-distorted coffers. No original evidence survived, since the ceiling had been re-plastered and the architect's plans omit it, so the 1980s restoration recreated it in the style of other classicist buildings.