After the destruction of the Aztec capital Tenochtitlan by Cortéz, the Templo Mayor, like most of the rest of the city, was taken apart and the area redeveloped by new structures of the Spanish colonial city. The Temple's exact location was forgotten. By the 20th century, scholars had a good idea where to look for it. This was based on the archeological work done at the end of the 19th century and the first half of the 20th. From 1978 to 1982, specialists directed by archeologist Eduardo Matos Moctezuma worked on the project to excavate the Temple. Initial excavations found that many of the artifacts were in good enough condition to study. Efforts coalesced into the Templo Mayor Project, which was authorized by presidential decree. For more, click here.