Joaquín Sáenz y Arriaga

Joaquín Sáenz y Arriaga (Joaquín Sáenz Arriaga; October 12, 1899 – April 28, 1976) was a Mexican Catholic priest and theologian. Jesuit from 1916 to 1952 he was later a harsh critic of the Second Vatican Council decisions and of the post-conciliar popes. In 1972, he was declared excommunicated by the Roman Catholic bishops' conference of Mexico. He is considered as the promoter of the sedevacantist ideas.

As a young man Sáenz Arriaga was brought up in the spirit of the Cristero pressure group, Miguel Pro and other Catholic martyrs who fought against the Freemasonic and Communist government of Mexico in the 1920s, when some Catholics faced up to firing squads with the cry ¡Viva Cristo Rey! ("Long live Christ the King!").

Sáenz y Arriaga placed great emphasis on the Catholic doctrine of the "Kingship of Christ", which militates against secularism and the separation of church and state. When the Vatican II reforms began to be implemented in Mexico and North America, it was Fr. Sáenz y Arriaga who led the fight against them.

His uncompromising traditionalism led to a rejection of the new Conciliar Church" and he became the first to propound the doctrine of sedevacantism, which maintains that, since the death of Pope Pius XII, there has been a sede vacante in Rome because the following so-called popes espoused the heretical teachings of the sham Second Vatican Council.

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