History of the Catholic Church in Mexico

In the history of Mexico, La Reforma (from Spanish: "The Reform"), or reform laws, refers to a pivotal set of laws, including a new constitution, that were enacted in the Second Federal Republic of Mexico during the 1850s after the Plan of Ayutla overthrew the dictatorship of Santa Anna. They were intended as modernizing measures: social, political, and economic, aimed at undermining the traditional power of the Catholic Church and the army. The reforms sought separation of church and state, equality before the law, and economic development. These anticlerical laws were enacted in the Second Mexican Republic between 1855 and 1863, during the governments of Juan Álvarez, Ignacio Comonfort and Benito Juárez. The laws also limited the ability of Catholic Church and Indigenous communities from collectively holding land. The liberal government sought the revenues from the disentailment of church property, which could fund the civil war against Mexican conservatives and to broaden the base of property ownership in Mexico and encouraging private enterprise. Several of them were raised to constitutional status by the constituent Congress that drafted the liberal Constitution of 1857. Although the laws had a major impact on the Catholic Church in Mexico, liberal proponents were not opposed to the church as a spiritual institution, but rather sought a secular state and a society not dominated by religion.

The Juárez Law reduced the power that military and ecclesiastical courts held. The Lerdo Law forced land held in collective ownership to be sold to individual owners. It aimed at creating a dynamic real estate market, creating a class of yeoman farmers owning their own land, and raising revenue for the state. The measure was intended to strip the Church of most of its property, as well as to break Indigenous communities' collective ownership of land.

The Mexican Catholic Church, or Catholic Church in Mexico, is part of the worldwide Catholic Church, under the spiritual leadership of the Pope, his Curia in Rome, and the national Mexican Episcopal Conference. According to the Mexican census, Roman Catholicism is the dominant religion in Mexico, practiced by 77.7 percent of the population in 2020. A Statistica survey suggests this number could be a little lower, suggesting Catholics could make up 72 percent of the nation.

The history of the Catholic Church in Mexico dates from the period of the Spanish conquest of the Aztec Empire (1519–1521) and it has continued as an institution in Mexico into the twenty-first century. In the late 20th century, Eastern Catholic jurisdictions were also established in Mexico.

The Royal and Pontifical University of Mexico (Spanish: Real y Pontificia Universidad de México) was a university founded on 21 September 1551 by Royal Decree signed by Charles I of Spain, in Valladolid, Spain. It is generally considered one of the first universities founded in North America and second in the Americas (preceded by the National University of San Marcos in Lima, Peru, chartered on May 12 of the same year, and the Universidad Michoacana de San Nicolás de Hidalgo, formerly known as the Royal College of Saint Nicholas, established in 1540. After the Mexican War of Independence it was renamed the University of Mexico.

When Mexican liberals were in power at intervals in the nineteenth century, it was closed, since liberals sought to put education in the hands of the state rather than the Roman Catholic Church. Its first closure was in 1833, when Valentín Gómez Farías implemented liberal policies. When Antonio López de Santa Anna returned to power, the university was reopened. It was finally abolished in 1865 during the Second Mexican Empire by Maximilian I of Mexico. Scattered institutions, including secularized successors of its faculties of law and medicine, other secular colleges founded by liberals on the model of the French grandes ecoles, and religious establishments outside Mexico City, continued without interruption.