Pedro de Alba y Astorga (c. 1601 – 1667) was a Friar Minor of the Strict Observance, and a voluminous writer on theological subjects, generally in defense of the Immaculate Conception.
[1] He lectured on theology, was Procurator-General of the Franciscans, in Rome, and Qualificator of the Holy Office.
Two editions of his work, "Nodus indissolubilis de conceptu mentis et conceptu ventris" (Madrid, 1661, 1663), are on the Index of prohibited books.
The most important is his "Armentarium Seraphicum pro tuendo Immaculatae Conceptionis titulo" (Madrid, 1648).
A notable work also written by Pedro is “Naturae Prodigium Gratiae Portentum (Prodigy of Nature, Portent of Grace).”[2] This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed.