Triangle Building, Modernist commercial building in São Paulo, Brazil

The Edifício Triângulo is a commercial building at Rua José Bonifácio 24, on the corner with Rua Quintino Bocaiúva, near Praça da Sé. Designed by Oscar Niemeyer and inaugurated in 1955, it was built for the Banco Nacional Imobiliário. Its upper floors step back laterally, giving a wedding-cake profile, and the main entrance is covered by a large panel of Di Cavalcanti tiles.

Designed by Oscar Niemeyer for the Banco Nacional Imobiliário and inaugurated in 1955, the building was one of the works produced by the architect's São Paulo satellite office under Carlos Lemos. A 1952 advertisement in O Estado de S. Paulo already promoted it to businesses seeking a central address. The city's setback rules forced the upper floors to step back, a change made by the satellite office without Niemeyer's signature.

The main entrance is covered by a large panel of glass and ceramic tiles by Di Cavalcanti, now much deteriorated. In the 1990s homeless people lit fires beside it, and fallen glass tiles were replaced with ceramic ones that also came down. The mural was listed by the city of São Paulo in 2004.

The building is located at Rua José Bonifácio 24 and is easily accessible via Anhangabaú Metro station on Line 2. You can view the mosaic panel at the entrance and explore the surrounding area, which connects to other modern structures in the city.

The name comes from the triangular block bounded by Rua Quintino Bocaiuva, Rua José Bonifácio and Rua Direita, known as the Triângulo, and the whole project was laid out to respect that shape. A 1952 advertisement in O Estado de S. Paulo pitched it to businessmen who knew the value of a good commercial location.