A new exhibit hosted by Museum of Templo Mayor in Mexico City marks the 45th anniversary of the discovery of a monolith depicting the Mexican lunar goddess, Coyolxauhqui (pronounced Koy-ol-shauw-kee). The finding was a milestone for Mexican archaeology, as it shed light on Mexica civilization before the Spanish conquest. For almost 500 years, the exact location of Templo Mayor remained a mystery. The religious complex was demolished shortly after Spanish conqueror Hernán Cortés ordered the destruction of every building in Tenochtitlan, capital of the Mexica empire, around 1521.