Tenochtitlan was an amazing city and larger than any in Europe at the time and held approximately 200,000 people with some estimates as high as 350,000. Built over 100 years or so on Lake Texcoco, the city was impressively organized. Being built on the lake meant that land platforms were created as needed in an orderly fashion leaving clean canal streets for canoe traffic and multiple bridges and paths for pedestrians. Each neighborhood was distinct and had its required services from schools...