From the back cover:
Here is the entire alphabet authentically illuminated in the historiated style; a term indicated that each letter is filled with miniature scenes and figures interwoven with artistry, wit and ingenuity. The period covers the two centuries just prior to the invention of the printing press, during which hand-drawn historiated letters reached the zenith of their creativity. This book is thus a distinguished addition to the growing list of International Design Library titles described on the inside back cover.