Question: Xokonoschtletl Gómora pushed for hte return of what artifact taken during hte Spanish Conquest of the Aztecs?
Sentence (from "Xokonoschtletl Gómora"): He is best known for leading the Asociación Civil Internacional Yankuik Anahuak (International Civil Association Yankuik Anahuak) and because for over thirty years he has pushed for the return of a quetzal feather headdress (Nahuatl: "quetzalpanecáyotl") known as Montezuma's headdress currently located in the Vienna Museum of Ethnology (German: "Museum für Völkerkunde").
Relevant evidence: Yes