It is a matter of established historical fact that the Templo Mayor of Tenochtitlan was built over, buried, and subsequently rediscovered beneath modern Mexico City.
The claim states that Tenochtitlan's Templo Mayor remained hidden beneath layers of urban development for centuries, which is a well-documented historical and archaeological reality regarding the superposition of Mexico City over the ancient Aztec capital. This falls under common knowledge as it is a widely accepted historical fact verified by the very existence of the Templo Mayor archaeological site discovered in the 20th century.