Question: Xokonoschtletl Gómora pushed for hte return of what artifact taken during hte Spanish Conquest of the Aztecs?

<P0-S0> The Conquest of the Azores (also known as the "Spanish conquest of the Azores"), but principally involving the conquest of the island of Terceira, occurred on 2 August 1583, in the Portuguese archipelago of the Azores, between forces loyal to the claimant D. António, Prior of Crato, supported by the French and English troops, and the Spanish and Portuguese forces loyal to King Philip II of Spain, commanded by the Admiral Don Álvaro de Bazán, Marquis of Santa Cruz, during the War of the Portuguese Succession. <P0-S1>  The victory of the Marquis of Santa Cruz resulted in the rapid Spanish conquest of the Azores, facilitating the integration of the Kingdom of Portugal and its colonial possessions into the Spanish Empire. <SEP> <P1-S0> Xokonoschtletl Gómora (] ; 17 February 1951, Mexico City) is a Mexican dancer who performs to Pre-Hispanic traditional music, a writer, lecturer, and civic activist. <P1-S1>  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"). <P1-S2>  He was commissioned by the United Nations for the Frente Mexicano Pro Derechos Humanos (English: Mexican Front for Human Rights) to promote the protection of Mexican cultural heritage. <SEP> <P2-S0> The Spanish conquest of Guatemala was a protracted conflict during the Spanish colonization of the Americas, in which Spanish colonisers gradually incorporated the territory that became the modern country of Guatemala into the colonial Viceroyalty of New Spain. <P2-S1>  Before the conquest, this territory contained a number of competing Mesoamerican kingdoms, the majority of which were Maya. <P2-S2>  Many conquistadors viewed the Maya as "infidels" who needed to be forcefully converted and pacified, disregarding the achievements of their civilization. <P2-S3>  The first contact between the Maya and European explorers came in the early 16th century when a Spanish ship sailing from Panama to Santo Domingo was wrecked on the east coast of the Yucatán Peninsula in 1511. <P2-S4>  Several Spanish expeditions followed in 1517 and 1519, making landfall on various parts of the Yucatán coast. <P2-S5>  The Spanish conquest of the Maya was a prolonged affair; the Maya kingdoms resisted integration into the Spanish Empire with such tenacity that their defeat took almost two centuries. <SEP> <P3-S0> Moctezuma's headdress is a featherwork crown (Nahuatl: "quetzalāpanecayōtl" ] ) which tradition holds belonged to Moctezuma II, the Aztec emperor at the time of the Spanish Conquest. <P3-S1>  However, its provenance is uncertain, and even its identity as a headdress has been questioned. <P3-S2>  It is made of quetzal and other feathers with sewn-on gold detailing. <P3-S3>  It is now in the Museum of Ethnology, Vienna, and is a source of dispute between Austria and Mexico, as no similar pieces remain in Mexico. <P3-S4>  Restoration efforts reignited this dispute in 2012.