04/19/2010 05:12 am ET Updated May 25, 2011

Book Of Hours Commissioned By Catherine Of Cleaves Is Astonishingly Detailed And Rich

The politically ambitious Catherine was an equally ambitious patron of the arts. In 1440, about the time she definitively refused to live with Arnold, she commissioned a Book of Hours--an illustrated compendium of prayers for different times of day, throughout the year.

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