Peter was born in the city of Valladolid, Spain to noble parents conspicuous for their wealth and virtue. Though he lost his father in his early youth, he was piously educated by his mother. At age 10, Peter begged to be admitted into the Seraphic Order, which was granted to him three years later in the convent of his native town.

In 1404 Peter de Regalado became one of the first disciples of Peter de Villacreces, who in 1397 had introduced into Spain the reform of the Observance of which he became one of the most zealous propagators. In the newly-founded convent at Aguilera Peter found the life of solitude, prayer and eminent poverty, which always had been the greatest desire. In 1415 he became superior of the convent at Aguilera and, on the death of Peter de Villacreces (1422), also of that at Tribulos or del Abroyo.

It is said that Peter de Regalago was endowed with the gift of miracles and prophecy and of every virtue. When his body was exhumed 36-six years after his death, at the instance of Isabella the Catholic, it was found incorrupt and placed in a more precious tomb. He was beatified by Innocent XI on March 11, 1684, and canonized by Benedict XIV on June 29, 1746.

Adapted by A.J. Valentini from: Heckmann, F. (1911). St. Peter de Regalado. In The Catholic Encyclopedia. New York: Robert Appleton Company. Retrieved March 23, 2021 from New Advent: