Building of Budapest Operetta Theater, Theater in Budapest District VI, Hungary

The Budapest Operetta Theater occupies a converted building on Nagymező Street 17, remodeled as a theatre in 1922 by architects László Vágó, Béla Málnai and István Szentgyörgyi. Its pink and pale grey plaster facade has a curved arched gable on the left, with two round-arched windows above an arcade and a niche holding a standing statue; the inscription band reads "BUDAPESTI OPERETT SZÍNHÁZ". The lighter grey right section has tall rectangular windows above and a curved glass-and-metal canopy over the entrances. The auditorium seats 901 and is lit by a chandelier more than a century old.

Somossy Károly bought the house at Nagymező utca 17 from Zsigmond Bródy and had Fellner and Helmer convert it into the Somossy Orfeum, which opened in 1894. After bankruptcy in 1899 it ran as the Fővárosi Orfeum until 1916. In 1922 Ben Blumenthal leased it and had László Vágó, Béla Málnai and István Szentgyörgyi rebuild it as a theatre, opened on 22 December 1922 with the operetta Olivia hercegnő.

The theatre performs operettas and musicals in Hungarian, staging works by Imre Kálmán and Franz Lehár alongside global musicals such as Elisabeth and Mozart!. Opposite the entrance stands a statue of Kálmán seated on a bench, facing the building. Since 2015 the house has marked the centenary of Kálmán's Csárdáskirálynő with galas and tours.

The theatre stands at Nagymező utca 17 in District VI, on the street known as Pest's Broadway; the monument to Imre Kálmán sits on a bench opposite, facing the building. The hall seats 901 and gained an extra tier above the boxes in the 1999–2001 renovation. The Raktár stage and the 200-seat Imre Kálmán theatre occupy spaces inside the same building.

The theatre's studio stage inside the building is called Raktárszínház. In the 2016–2017 season the management also took over the original Orfeum cabaret rooms in the same building, long barely used, and opened a 200-seat venue there, the Imre Kálmán Theatre, whose first production was The Girl from the Riviera.