Torre de Tlatelolco, Modernist office tower in Nonoalco-Tlatelolco, Mexico City, Mexico.

The Torre de Tlatelolco is a 100-meter, 22-floor building in the Nonoalco-Tlatelolco housing unit of Mexico City, designed by Pedro Ramírez Vázquez with a metal frame clad in white marble. It stands beside the Plaza de las Tres Culturas and the Tlatelolco archaeological zone. Since 2007 it has housed the Centro Cultural Universitario Tlatelolco of UNAM, including an exhibition on the 1968 student movement.

Designed by Pedro Ramírez Vázquez, the tower was commissioned in 1957 and built from 1960 to 1966, during Gustavo Díaz Ordaz's presidency, to house Mexico's Foreign Ministry. In 1967 it hosted the signing of the Treaty of Tlatelolco banning nuclear weapons in Latin America and the Caribbean. The ministry left in 2005, and the building passed to UNAM, which opened its cultural center there in 2007.

The tower is home to the Centro Cultural Universitario Tlatelolco, run by UNAM, where visitors can see rotating exhibitions and works from the Blaisten Collection of Mexican art. The mix of gallery spaces and classrooms spread across the floors gives the building a working, lived-in feel.

The tower sits in a central part of Mexico City and is easy to reach by public transport. Because it operates as an active university campus, access to certain floors or areas may depend on what events or programs are running that day.

The tower is anchored by 45 steel-and-concrete piles driven 35 metres into the ground and fitted with 36 seismic dampers. In 1967 it hosted the signing of the Treaty of Tlatelolco, which banned nuclear weapons in Latin America and the Caribbean.