Born in Carazo in 1880, Pedro Segura y Sáenz attended the seminary in Burgos and the Pontifical University of Comillas before being ordained to the priesthood on 9 June 1906.

Segura was created Cardinal-Priest of Santa Maria in Trastevere by Pope Pius in the consistory of 19 December the same year.

[3] Late in his administration, a series of pamphlets were distributed which were seen as attacking Segura's enemies, who were considered to include the Pope and the Spanish nuncio.

In November 1954 Segura was recalled from his position by the Vatican but refused to leave the Archiepiscopal Palace and had to be removed by police.

[8] The author Laurie Lee on page 40 of his book A Rose for Winter, describes a mass he attended in 1949 at Seville Cathedral which was presided over by the Archbishop.