Did the leader of the Aztec leader have religious significance?
Yes. He was believed to have a connection to the gods.
Aztec art often focused around animals. Jaguars had significance to Aztec people and are found on a lot of artwork. The artwork also has a large number of gods represented in it, often in highly stylised forms. A particularly common symbol is that of the two-headed snake. Depictions of religious events (human sacrifices and temple services) are quite common.