 Previously, the Royal House had no crown.Made of steel and containing stones from the Biobío River, it is on display at the Museum of the Kings of Araucania, outside the village of Chourgnac d'Ans, Dordogne, France.Prior to the Spanish conquest (1519–1522) most of present-day Mexico formed the Aztec Empire, a Native American empire ruled from Tenochtitlán (present day Mexico City) by a "tlatoani" or "emperor".