This is a detail of an original leaf from the Polychronicon printed by William Caxton at Westminster in the year 1482!
Location: Special Collections Z232 C38 K87
The particular book was beautifully designed and letterpress printed in 1938 by the Grabhorn Press for The Book Club of California and contains a specimen, one actual original page from the Polychronicon.
The Polychronicon (Universal History) was printed by William Caxton in 1482 and circulated widely. It was written by Benedictine monks and is actually more legend than fact. But it was Caxton's most ambitious printing project and the longest book in terms of page count.