It is dedicated to Our Lady of the Immaculate Conception and is the seat of the Archdiocese of Puebla. Its construction dates back to 1539 but it was not until 1690 that it acquired the shape and size it has today. It is of Herrerian style with Renaissance facades and Baroque interiors. Today, it is considered one of the most beautiful in the world due to the many treasures of its interior.
Its two towers, flanking the Puerta del Perdón, are among the highest in the country. In its interior the Altar of the Kings, the sumptuous Baldaquino or Cypress, the altar of the Forgiveness and choir of magnificent chairs, the three organs, the paintings of Miguel Cabrera in the Viacrucis, the Chapel of the Holy Spirit and the Sacristy are stand-out features that guard authentic treasures of religious art.
Currently the videomapping "Mosaicos Poblanos" is projected on the main facade on weekends which consists of a show that displays different stages of the history of the State, cuisine, talavera, textiles and popular festivals.