High Quality Content by WIKIPEDIA articles! El Tajin is a pre-Columbian archeological site and was the site of one of the largest and most important cities of the Classic era of Mesoamerica. The city flourished from 600 to 1200 C.E. and during this time numerous temples, palaces, Mesoamerican ballcourts and pyramids were built. From the time the city fell in 1230 to near the end of the 18th century, no European seems to have known of its existence, until a government inspector chanced upon the Pyramid of the Niches in 1785. El Tajin 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 Ball Courts and the palaces of Tajin Chico. In total there have been 17 ball courts discovered at this site. Since the 1970s, El Tajin has been the most important archeological site in Veracruz for tourists, attracting over 650,000 visitors a year. It is also the site of the annual Cumbre Tajin Festival, which occurs each March featuring indigenous and foreign cultural events as well as concerts by popular musicians.