the Eagle Door or Eagle Gate to the Templo Mayor patio (the location is a matter of some debate--see attestations); also cited as a neighborhood (barrio) of Tenochtitlan
"Cuauhquiyahuac was the correct designation of the south gate of the Tenochtitlan Templo Mayor enclosure..."
Cuauhquiyahuac = Eagle doorway
"And it is called the Door of the Eagle, because an eagle was (standing) there engraved in stone...."
"...Cuauhquiyahuac. On one side of the eagle was a tiger, also of stone, and on the other side a bear, also of stone. It is now clear that Sahagún's informants are describing the north side of the precinct...."
"los españoles combatieron a los indios en el patio Cuauhquiyahuac"
Cuauhquiyahuac = un barrio indígena en la isla de Tenochtitlan