Twentieth Century Encyclopedia of Catholicism

The Twentieth Century Encyclopedia of Catholicism is a series of 150 short works on topics pertaining to Catholicism originally published in France. It was published in English in the United States by Hawthorn Books. The series editor was Henri Daniel-Rops. The series was divided into 15 sections. In the United States, volumes were published individually over a number of years and made available for sale separately.

The List of the 15 Sections of the English series:
I. Knowledge and Faith (15 Volumes)
II. The Basic Truths (13 Volumes)
III. The Nature of Man (8 Volumes)
IV. The Means of Redemption (11 Volumes)
V. The Life of Faith (12 Volumes)
VI. The Word of God (14 Volumes)
VII. The History of the Church (6 Volumes)
VIII. The Organization of the Church (9 Volumes)
IX. The Church and the Modern World (19 Volumes)
X. The Worship of the Church (8 Volumes)
XI. Catholicism and Literature (4 Volumes)
XII. Catholicism and the Arts (7 Volumes)
XIII. Catholicism and Science (8 Volumes)
XIV. Outside the Church (5 Volumes)
XV. Non-Christian Beliefs (7 Volumes)
XVI. General and Supplementary (4 Volumes)