 His Apocalypsis nova, which contained prophecies of a pope, the "Angelic Pastor", who would work with an emperor to restore harmony in the church and the world, was influential well into the next century, in Rome and the monarchies of Spain and Portugal.He was born João de Menezes da Silva in 1420 in Campo Maior, Portugal, the youngest of the eleven children of Rui Gomes da Silva, the first Magistrate of Campo Maior, on the border of Spain and Portugal, and of Isabel de Menezes, an illegitimate daughter of Dom Pedro de Menezes, 1st Count of Vila Real and 2nd Count of Viana do Alentejo, under whom Silva served in Ceuta.One of his sisters was Saint Beatrice of Silva, a noted Marian mystic and the foundress of the monastic Order of the Immaculate Conception.