Coliseum Theatre of Buenos Aires, Historic theatre in Retiro, Argentina.

The Teatro Coliseo stands at Marcelo T. de Alvear 1125, facing Plaza Libertad in Retiro. Its pale stone facade carries a wide black sign reading "TEATRO COLISE0" and "PALAZZO ITALIA", flanked by two red-glowing screens, with a narrow metal-railed balcony above and three tall dark-glass openings framed by stone pilasters. Inside, a light floor and white ceiling surround a white column, a staircase with metal handrails, a lower counter, and a wall of vertical wood slats lit along its upper edge.

The theatre opened on 8 July 1905 as a circus hall run by the British clown Frank Brown, a key figure in the origins of the Creole circus in Argentina. It closed in 1937 and was bought by the Italian government; after partial demolition in 1938 and a pause during World War II, a new building housing part of the Italian consulate was raised while keeping the hall. It reopened in 1961 with Menotti's The Saint of Bleecker Street, performed by the Teatro Argentino of La Plata.

The building has housed the Italian Institute of Culture since the 1971 remodeling by Mario Bigongiari, Maurizio Mazzocchi and the Morea brothers, who also moved the Italian Consulate there. In the late 1960s the Mandioca label held its Beat Baires Sunday-morning recitals here, where Almendra, Manal and Vox Dei played; Almendra premiered Muchacha on 22 June 1969.

The theatre sits across from Plaza Libertad in the Retiro neighbourhood and is easy to reach. Visitors should check ahead to see what performances are coming up, as the programme changes throughout the year.

On August 27, 1920, Enrique Telémaco Susini broadcast from the theatre's terrace, launching L.O.R. Radio Argentina — one of the first radio transmissions in history, not the country's first. The theatre had opened in 1905 as a circus hall run by British clown Frank Brown.