The Conjunto Urbano Nonoalco Tlatelolco is the largest apartment complex in Mexico, and second largest in North America, after New York's Co-op City. The complex is located in the Cuauhtémoc borough of Mexico City. It was built in the 1960s by architect Mario Pani. Originally, the complex had 102 apartment buildings, with its own schools, hospitals, stores and more, to make it a city within a city. It was also created to be a kind of human habitat and includes artwork such as murals and green spaces such as the Santiago Tlatelolco Garden. Today, the complex is smaller than it was and in a state of deterioration, mostly due to the effects and after effects of the 1985 Mexico City earthquake. This quake caused the immediate collapse of the Nuevo León building with others being demolished in the months afterwards. Further earthquakes in 1993 caused the condemnation of more buildings. In addition to the lost buildings, many residents eventually undersold or abandoned their apartments, as repairs were either never made or made poorly.