El Tajín is a pre-Columbian archeological site in southern Mexico and is one of the largest and most important cities of the Classic era of Mesoamerica. A part of the Classic Veracruz culture, El Tajín flourished from 600 to 1200 C.E. and during this time numerous temples, palaces, ballcourts, and pyramids were built. El Tajín was named a World Heritage site in 1992, due to its cultural importance and its architecture. This architecture includes the use of decorative niches and cement in forms unknown in the rest of Mesoamerica. Its best-known monument is the Pyramid of the Niches, but other important monuments include the Arroyo Group, the North and South Ballcourts and the palaces of Tajín Chico.