Officium Beatiae Mariae Virginis.
Imposition schemes of miniature books are notoriously complex, and it is challenging to decipher their format via chain lines, watermarks, and signatures. The unopened, untrimmed leaves of this Plantin Press Book of Hours allow us to see the book’s large original margins, thus offering a clue as to the dimensions of the sheets of paper on which it was printed. In many cases, full margins, such as these, would have been cut down when the book was bound.
From the collection of Rare Book School