ion, the city was taken by forces under General Pablo Gonzalez, and then later was under Zapatista control.
Recent events
From 1931 until the end of the 20th century, growth of the city spurred the absorption of the municipalities of Ignacio Mariscal, San Felipe Hueyotlipan, Resurreccion, San Jeronimo Caleras, San Miguel Canoa and San Francisco Totimehuac�n into the city. In 1950, by decree of the state congress, the city received the title of Heroica Puebla de Zaragoza. In 1977, the federal government declared the city as a Zone of Historical Monuments. In 1987, the historic center of Puebla is declared a World Heritage Site by UNESCO.
The City of Puebla submitted its candidacy to hold the headquarters of the Free Trade Area of the Americas, and briefly served as interim secretariat headquarters, until negotiations were stopped on 2005
