Pedro Casciaro was one of the earliest members of Opus Dei, the Catholic organization founded by St. Josemaria Escriva in 1928. Casciaro joined Opus Dei in 1935 at the age of 20. He lived beside the founder during the difficult years of the Spanish Civil War and was ordained in 1946. He had become one of St. Josemaria’s most trusted aides in the worldwide development of Opus Dei.

Pedro Casciaro died in Mexico in 1995.