Blessed Miguel Agustín Pro (1891–1927) was a Jesuit priest and martyr from Mexico, celebrated for his courage and faith during a time of intense religious persecution under the anti-clerical Mexican government. Born on January 13, 1891, in Guadalupe, Mexico, Miguel grew up in a devout Catholic family and entered the Jesuit novitiate at 20. Forced to flee due to government repression, he continued his studies in Spain and Belgium, where he was ordained a priest in 1925. Despite his ill health, Pro returned to Mexico in 1926, determined to minister to the faithful in secret.

As religious practices were outlawed under the Calles Law, Pro served the underground Church, celebrating Mass, hearing confessions, and administering sacraments in disguise to avoid detection. His acts of bravery, often carried out with humor and ingenuity, made him a beacon of hope for persecuted Catholics. However, in November 1927, Pro and his brothers were arrested under false accusations of involvement in an assassination attempt against a former president. Though no evidence linked him to the crime, the government sought to make an example of him.

On November 23, 1927, Miguel Pro was executed by firing squad, with his final words being "Viva Cristo Rey!" ("Long live Christ the King!"). His heroic death became a rallying cry for the Cristero movement, and his life inspired countless believers to remain steadfast in their faith. Miguel Pro was beatified by Pope John Paul II on September 25, 1988.