Teatro de los Mineros de Lota, theatre in Lota, Chile

Teatro de los Mineros de Lota is the theatre of the miners' union No. 6, on Galvarino Street facing the plaza de armas. Its final design by Sergio Bravo Ramos, Javier "Maco" Gutiérrez, Carlos Martner García and Betty Fishman Lohaus covered 3,000 m², with an exterior stage reached by two stairways. The main hall seats 2,400 and the galleries about 4,000; the ground floor held union offices, a women's room, a hairdresser and dressing rooms, the mezzanine a library and games rooms.

The theatre was built from 1954 to 1957 during the peak of coal mining in the Biobío Region. The miners' union funded its construction as a reflection of their economic power and community importance at that moment.

The union's original plan included murals on the exterior and interior depicting workers' conditions and Lota's traditions. On the main facade Julio Escámez painted a mural 7 metres wide by 9 metres long, and another 20 metres long on the side exterior wall.

The theatre stands at Galvarino 201, directly facing Lota's plaza de armas, so it is easy to locate on foot in the town centre. The main hall holds 2,400 spectators and the galleries about 4,000. The ground floor housed the union offices, a women's room, a hairdressing service and public baths, while the mezzanine held games, a library and exhibition rooms.

The building represents an early example of modern architecture in the Biobío Region and received national monument status in 2009. This recognition marks the importance of mining heritage and the workers who shaped the region's identity.