Parisians and their visitors are in for a treat: for the last time they will get to see the beautiful, individual leaves of the Belles Heures of Jean de France, Duc de Berry, before a valuable piece of their cultural heritage is whisked off once more to foreign climes. The Belles Heures is one of the most beautiful examples of an illustrated ‘book of hours’, a ‘devotional’ book for our devout, God-fearing medieval ancestors who felt like once a week just wasn’t devoting enough time to God, so they ordered manuals with instructions on how to pray better and more regularly at home. In today’s increasingly secular society, many of…