Dumont-Adams Building, Modernist museum on Paulista Avenue, São Paulo, Brazil.

The Dumont-Adams Building is a black reinforced-concrete monolith on Avenida Paulista at Alameda Casa Branca, next to the MASP. Its 14 floors, designed by architect Martin Corullon, replaced the earlier structures and hold five floors of art galleries, a school, restoration workshops and a restaurant, linked to the museum by a tunnel.

The building was a residential Art Deco structure completed in 1958, belonging to the family of Plínio de Oliveira Adams until 2005, when MASP bought it with sponsorship from Vivo. A 17-story remodeling with a 125 m tower by Júlio Neves was vetoed by São Paulo's heritage department and halted in 2013. In 2022 Vivo returned about R$ 13 million, and a new black concrete project by architect Martin Corullon opened in 2024–2025, connected to MASP by a tunnel.

The building reflects how Paulista Avenue transformed from a residential street into a cultural corridor, with former apartments becoming exhibition spaces. This shift shows how the city evolved to prioritize art and public engagement over private housing.

The building sits conveniently near public transportation stops on Paulista Avenue, making it easy to reach. The renovation includes modern facilities such as elevators and accessible entrances for all visitors.

The Vivo telecom company backed MASP's 2005 purchase in exchange for displaying its products for sale, tied to a planned 125-metre observation and data tower by Júlio Neves. That tower was never built: the 2024 expansion by architect Martin Corullon, a black reinforced-concrete monolith, ended the tower plans and connects to MASP by a tunnel.