The holy city of Teotihuacán (‘the place where the gods were created’) is situated some 50 km (30 miles) north-east of Mexico City. Built between the 1st and 7th centuries A.D., it is characterized by the vast size of its monuments – in particular, the Temple of Quetzalcoatl and the Pyramids of the Sun and the Moon, laid out on geometric and symbolic principles. Teotihuacan extended its cultural and artistic influence throughout the region, and even beyond. The site covers a total surface area of 83 square km (32 sq mi) and was designated a UNESCO World Heritage Site in 1987. It is the most visited archaeological site in Mexico.