Full Page Illustrations in Volume I
| Frontispiece in Colour | PAGE |
| The Cathedral, Aachen (Aix-la-Chapelle) | 2 |
| Abbeys: Muckross, Downside, and Fountains | 14 |
| Facsimile Title Page History of the Dominicans in the Philippines | 160 |
| The Ruins of Timgad | 190 |
| Ruins of Forum, Tribune, Capitol, and Great Basilica, Timgad | 192 |
| Alaska | 250 |
| University of Alealà | 270 |
| High Altar, Certosa of Pavia | 346 |
| The Pala D'Oro, Milan | 388 |
| Polyglot Psalter, Genoa (A.D. 1516) | 412 |
| Letter of Alexander VI to Bernard Boil, O.S.B | 414 |
| American College, Rome | 422 |
| Cathedral of Notre Dame, Amiens | 430 |
| The Ancren Riwle | 464 |
| Door of the Baptistery, Florence | 470 |
| The Bewcastle Cross | 508 |
| Anglo-Saxon Crosses | 510 |
| Cathedral of St. Peter, Angoulème | 512 |
| Facsimile page from Antiphonary of St. Gregory | 578 |
| Cathedral of Notre Dame, Antwerp | 588 |
| Sant'Apollinare, Ravenna | 616 |
| Christ amid His Apostles | 626 |
| Facsimile pages from the Book of Armagh | 734 |
| The Nativity, Ascension, and Glorification, with Zodiacal signs | 766 |
Maps
| Durham Cathedral and Abbey | 11 |
| Africa | 180 |
| Alaska | 248 |
| Western Hemisphere | 408 |
| ""(areas of discovery) | 410 |
| Asia Minor | 780 |
| Western Asia Minor | 784 |
