Quartel da Luz, Military police barracks in Bom Retiro district, São Paulo, Brazil

Quartel da Luz is a large military building with four equal sides measuring around 84 meters and an underground tunnel system that circles the entire perimeter. The structure displays the classic design of a barracks with its characteristic square layout and hidden subterranean passages.

The barracks carries the name of Brigadier Rafael Tobias de Aguiar, who in 1831 created the Permanent Police Corps, the origin of São Paulo's Military Police. During the 1924 Revolution, legalist forces fired cannon from a chimney on the building, whose marks remain visible. In 1932 the battalion stationed here fought against President Getúlio Vargas. A fire damaged the premises on 7 December 2004, and restoration work began in 2011.

In the courtyard stand monuments to the twelve São Paulo soldiers killed at Canudos in 1897, inscribed "Aos soldados paulistas mortos em Canudos", and to the dead of 1932. Busts honour Rafael Tobias de Aguiar and Lieutenant Salvador D'Aquino, who founded ROTA on 15 October 1970. The monument "A Rota é reservada aos heróis" lists 45 officers killed on duty since 1980.

The barracks stands on Avenida Tiradentes in the Luz area of central São Paulo, near the Luz railway and metro stations. It is an active ROTA base, so the courtyard and the underground museum with uniforms and historical images are visited only by arrangement. The tunnels themselves are closed because of instability, and part of their route is blocked by nearby metro construction.

The building was constructed with imported materials, including bricks from Italy and tiles from France, resembling the architecture of the French Foreign Legion headquarters in Morocco. This international material sourcing was an unusual choice for a late 19th-century Brazilian military structure.