20 points! give me a list of what were the aztecs inventions/developments. also try to include pictures of each invention.

The Aztecs are best known as a violent people who expanded their empire through ruthless warfare. They also had a reputation for making human sacrifices in elaborate rituals -- that often involved the removal of beating hearts -- to appease their many gods. While these practices were certainly true, the culture also gave birth to elaborate crafts, a highly organized system of government and a language -- Nahuatl -- that's still spoken by a million people.