A rainstorm revealed a tunnel beneath this city that yielded a saucer shaped like a flying dog, greenstone crocodile teeth, and liquid mercury used to represent lakes. Murals found in this city may denote important people with a three-tasseled headdress. The multiethnic merchant class of this city may have launched a fire that destroyed its temples and Xalla (“SHAH-lah”) palace, beginning the city’s collapse around 550 CE alongside abrupt droughts. This city’s influence likely spread the sloped talud-tablero construction style found at Monte (-5[1])Albán and Tikal. This city’s Nahuatl name translates roughly to “place where Gods were born,” as the Aztecs claimed descent from its builders. For 10 points, name this city where the Avenue of the Dead links the (10[1])Pyramids of the Sun and Moon, (-5[1])an ancient city in the Valley of Mexico. ■END■ (0[2])