In the Aztec civilization during the “Golden Era” Tenochtitlan was one of the biggest cities in the world. The city was contained within high mountains and was surrounding a lake and marshes, this is why one their most notable inventions they made, floating gardens or Campinas were made .By the early 1500s Tenochtitlan contained an array of pyramids, temples, palaces and market places. But in 1519 Hernán Cortés and his small Spanish army arrived and overthrew the Mexica ruler Moctezuma Xocoyotzin with relative ease. This was partly due to the latter's weakness, as well as the Spaniards' superior weaponry, their unfamiliar battle tactics and the devastation of the Mexica population by European disease. Mexico remained under Spanish rule until