San Pietro in Montorio
Pope Pius XII named Deniel Archbishop of Toledo, and thus Primate of the Church in Spain, on October 3, 1941. He was created cardinal-priest of "San Pietro in Montorio" by Pope Pius in the consistory of February 18, 1946. Deniel was one of the cardinal-electors who participated in the 1958 papal conclave, which selected Pope John XXIII. From 1962 to 1965, he attended the Second Vatican Council, and sat on its Board of Presidency.