The historic centre of Puebla de Zaragoza was designated a UNESCO World Heritage Site on 11th December, 1987. The Historic Centre of Puebla is one of the oldest colonial cities in the continent and among the best-preserved in Mexico Puebla has preserved its great religious structures like the 16th–17th-century cathedral and fine buildings like the old archbishop's palace, as well as a host of houses with walls covered in tiles (azulejos). The new aesthetic concepts resulting from the fusion of European and American styles were adopted locally and are peculiar to the Baroque district of Puebla.
