ocr: The public entrance of the Citadel isa monumental staircase on the Street of the Dead. Inside the Citadel a plaza opens onto the Temple of Quetzalcoatl, the principal sacred building in this area. The temple's facade represents the most successful integration of architecture and sculpture SO far discovered at Teotihuacan. The Great Compound, across the street from the Citadel, had gone unrecognized as ar major structure until our survey. We found that it differs from all other known structures at Teotihuacan and that in area it is the city's largest. Its main components are two great raised pl ...