Teatro São Pedro, Historic theatre in Campos Elísios, São Paulo, Brazil

Teatro São Pedro is a theatre in São Paulo designed by Italian architect Augusto Bernadelli Marquesini and built by Antônio Alves Villares da Silva. Its eclectic style is mainly neoclassical with art nouveau details, and its horseshoe-shaped floor plan was made for mixed functions. The stage has a 4-meter proscenium that could become a pit for 50 musicians.

The theatre was founded in 1917 by a Portuguese entrepreneur and ranks among the oldest active theatres in the city. It survived periods of threat and neglect, but was preserved through the efforts of local artists.

The theatre's name comes from São Pedro, the neighbourhood where it stands. Since 2010 it has hosted the Orthesp orchestra, and in 2013 an opera academy was founded there to train young singers, whose members perform in annual concerts alongside the main-stage operas.

The theatre stands at Rua Doutor Albuquerque Lins 207, in Santa Cecília, about 400 metres from Marechal Deodoro metro station. The corner plot covers 1,373 square metres. The main hall now seats 636 people, and the smaller Studio São Pedro holds 200.

The stage's 4-metre proscenium could be converted into a pit seating 50 musicians, a mechanism from the 1917 design by architect Augusto Bernadelli Marquesini. The horseshoe-shaped floor plan was conceived for mixed theatre and music use. The building was listed by CONDEPHAAT in 1984.