Veracruz and Puebla, with some small areas now part of Hidalgo over the course of the 19th century. Borders fluctuated over this time but were set by the beginning of Mexican Revolution. The mestizos, meanwhile, were privatizing communally held land, confiscating religious property and prohibiting public worship to weaken the power of indigenous authorities. The Totonacs had some luck in turning the tide during the Mexican Revolution but these gains were lost in the 1930s. The process of dividing Totonacapan into various smaller entities politically and economically continued through the 20th century. One development was the construction of the Mexico City-Tuxpan highway and the development of petroleum extraction in the Poza Rica area. The Teziutlán-Tlatlauquitepec highway to Tenampulco reinforced a Veracruz/Puebla border. While there is still a very large population of Totonacs in both states, as Mexico's tenth largest indigenous group, today, what is called Totonacapan is only a fraction of former Totonac lands. It refers to a region in Veracruz, which is made up of fifteen municipalities: Cazones de Herrera, Coahuitlán, Coatzintla, Coyutla, Chumatlan, Espinal, Filomeno Mata, Gutiérrez Zamora, Mecatlán, Papantla, Poza Rica de Hidalgo, Tecolutla, Tihuatlán, and Zozocolco de Hidalgo. The Totonac population continues to decline in both states, especially since the 1980s with many migrating out due to the poor economy of the region. History has put pressure on the Totonac language, with speakers switching over to Spanish and in some cases, to Nahuatl even though those who change language still consider themselves Totonac. Archeological sites The most important archeological site in the region is El Tajín, located near Papantla, 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, especially to the Totonac people 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. Since the 1970s, El Tajin has been the most important archeological site in Veracruz for tourists, attracting over 650,000 visitors a year. The next most