For 10 points, name this group who created the major illuminated manuscript of the 15th-century, Tres Riches Heures.
In their most famous work the 13th image is entitled The Anatomical Man but of the two figures seen it is a woman, with the signs of the zodiac ascending up her naked body, who faces the viewer.  That work ends with preliminary drawings for two more images, but the actual final image is that of the Martyrdom of St. Andrew.  In the same work, their patron can be seen wearing a brilliant blue robe on the right on the first folio.  Some of their sections were completed by the "Master of Shadows" and in their time they were known as the "courtly," "pious," and "rustic" painters.  Their major achievement remains the opening calendar, featuring one month painted by Jean Colombe. They worked at the behest of Jean, Duc de Berry, and their names were Johan, Herman, and Paul.  For 10 points, name this group who created the major illuminated manuscript of the 15th-century, Tres Riches Heures.
In their most famous work the 13th image is entitled The Anatomical Man
the Limbourg brothers