The Archdiocese of Puebla de los Ángeles is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church. It is the oldest Catholic diocese in Mexico. It was established on October 13, 1525 as the "Diocese of Tlaxcala" and retained that name until it was elevated to an archdiocese in 1903. In 1959 a new Diocese of Tlaxcala was created and is suffragan to the Archdiocese of Puebla de los Ángeles.

The Archdiocese of Mexico is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church that is situated in Mexico City, Mexico. It was erected as a diocese on 2 September 1530 and elevated to an archdiocese on 12 February 1546. The archdiocese is one of the largest in the world, with over four million Catholics, surpassed only by Kinshasa, Guadalajara, São Paulo, Puebla de los Ángeles, Santiago de Guatemala, and Milan.