Jean Danielou, S.J. (1905–1974), was a Jesuit theologian, patristic scholar, spiritual writer, bishop, and cardinal. He entered the Society of Jesus in 1929 and was ordained in 1938. During World War II he served with the Armée de l’Air (the French Air Force) in 1939–1940. Danielou studied under Henri de Lubac at Fourvière in Lyon and received his doctorate in theology in 1942.
In 1944 he was made Professor of Early Christian History at the Institut Catholique de Paris, where he later became dean. Among his most influential books were The Bible and the Liturgy, The Lord of History, and From Shadows to Reality. At the invitation of Pope John XXIII Danielou served as an expert advisor at the Second Vatican Council (1962–1965).