Manuel Fernández de Santa Cruz y Sahagún was a religious writer and Roman Catholic prelate who served as Bishop of Guadalajara, and Bishop of Tlaxcala. As well as founding charitable institutions in his diocese, he published Sor Juana's Carta atenagórica - without her permission and told her to focus on religious instead of secular studies, despite agreeing with her criticisms.

The Roman Catholic Archdiocese of Guadalajara is a Roman Catholic archdiocese based in the Mexican city of Guadalajara, Jalisco. It currently covers an area of 20,827 km². The diocese was erected on July 13, 1548 and was elevated to Archdiocese on January 26, 1863.