Anfiteatro Martín Fierro, Open-air theatre in Paseo del Bosque, La Plata, Argentina.

Anfiteatro Martín Fierro is an open-air theatre on an island in the lake of Paseo del Bosque, La Plata. A bridge leads to a monumental portico with three arches topped by a straight fronton, flanked by rows of columns. Beyond it, two large perimeter pergolas frame the seating area, and an oval stage building crowned by a dome closes the composition. Capacity is 2,600 spectators.

In 1902 the Italian Nicolás Cúcolo obtained a concession on the lake island of Paseo del Bosque and built a wooden open-air theatre seating 100. Provincial laws of 1911 and 1914 funded a replacement, the Teatro del Lago, inaugurated in 1914 as a 500-seat cinema and run by Cúcolo until he sold the concession in 1918. The old hall was demolished in the 1940s and the present open-air theatre, designed in 1945, opened on 18 November 1949 for the city's 67th anniversary, with Juan Domingo Perón, Eva Perón, governor Domingo Mercante and Héctor José Cámpora present.

The venue's name honours Martín Fierro, the gaucho hero of José Hernández's 1872 epic poem. Its earlier name, Teatro del Lago, is still used locally because the building stands on an island in the Paseo del Bosque lake, reached by a bridge. The 1949 opening formed part of the celebrations for the 67th anniversary of the founding of La Plata.

The theatre sits on an island in the lake of Paseo del Bosque. A bridge leads to the monumental three-arch portico that serves as the main entrance, and there are also access points from Nicolás Cúccolo and Juan Prossi streets. The surrounding vegetation forms the boundary of the site instead of walls.

The stage building has an oval plan topped by a dome, with the stage opening on one side; it also houses the theatre's support facilities. Behind the scenes, individual and shared dressing rooms for both sexes, with showers kept apart from the toilets, can accommodate up to two hundred people.