Book of Hours, single leaf. Page 163.

These leaves come from the celebrated atelier known as the 1520s Hours Workshop... Myra Orth in her dissertation on the workshop identifies four closely related painters as being responsible for the devotional manuscripts known to have been produced by the atelier, almost all of them tiny Books of Hours of jewel-like quality done for wealthy patrons. The four artists are all eponymous: the Master of the Rosenwald Hours, the Master of Jean de Mauléon, the Master of the Getty Epistles, and the Doheny Master, who is responsible for this leaf and who, says Christopher de Hamel, "may have been the master of the whole enterprise." ...The workshop has traditionally been located in Tours (which had the status at the time of being France's second capital city), but recent scholarship, particularly by Orth, suggests that its home may have been in Paris. -- Adapted from dealer's online catalog