When and where did Cortes make a claim on the royal treasure?

Hernán Cortés made a claim on the royal treasure in 1521 after the fall of Tenochtitlán, the capital of the Aztec Empire. Following a successful siege, he and his men seized vast amounts of gold and silver, which they considered the royal treasure of Spain. Cortés subsequently sent large quantities of this wealth back to Spain to demonstrate his success and secure favor with the Spanish crown.