Diego José de Cádiz

José Francisco López-Caamaño y García Pérez was born in Cádiz in 1743.[3] His lineage dated from the Visigoth kings. His mother died when he was 9 years old. Later his father moved the family to the city of Grazalema, where he entered the local school run by the Dominican Order. Though of noble ancestry, as a youth Joseph could make no progress at school, receiving the nickname of the "dunce of Cadiz". Later a classmate, a Dominican friar named Antonio Querero, testified how difficult study had been for him.

Initially rejected by the Observant Franciscan friars due to this perceived limitation of intellect, López-Caamaño was later accepted by the Capuchin friars and, at the age of 15, entered their novitiate in Seville, at which time he was given the name Didacus Joseph. He was professed as a member of the Order on 31 March 1759.[3] He was ordained to the priesthood in Carmona in 1766, for which he prepared himself by an extremely ascetic life.

In 1771, after further training in homiletics, he was assigned to one of the teams of friars who would preach parish missions to residents of isolated, rural villages, which was a major focus of the Capuchins of that era. His biographers stated that the congregations marveled at the tender love he displayed to the crucifix he would hold while preaching, and the singular power of his words, which swayed his audiences and left an impression on their lives. He wandered throughout the entire peninsula on foot, preaching in this way to the various communities he encountered on the road.

Spain was undergoing changes in its intellectual climate, as the influence of the Enlightenment began to spread in the upper classes of the country. Didacus became a major force in promoting the traditional devotions and beliefs of Catholicism as part of the identity of the nation, and is seen as an early integrist in the development of Spanish culture, opposing Liberal Catholicism. He also was a strong critic of the policy of consumerism, being promoted in the universities and some government circles. For this teaching, he was denounced to the Spanish Inquisition for attacking royal prerogatives. In turn, he accused the proponents of new economic policies and the secularization of Spanish society of heresy. He preached at the Royal Court in 1783, but found that he had no effect on the nobility. Leaving Madrid in disappointment, he later wrote: "I do not want the royal couple to remember me".

Didacus was appointed an official of the Inquisition, the synodal examiner for almost all Spanish dioceses and an honorary canon. The University of Granada conferred upon him the honorary degrees of Master of Arts and doctorates in Theology and canon law. A collection of his sermons numbers 3,000.