This painting by Bev Dunbar is adapted from Les Tres Riches Heures du Duc de Berry, painted on vellum between 1412 and 1416. The original painting is 225 x 136 mm, so it is quite small.
The compete series is one of the finest examples of French Gothic medieval manuscript illumination. It was originally created by the Limbourg brothers for the Duke of Berry. Unfortunately the Duke and the painters all died of the plague soon after the series was created.
This painting was originally part of the represention the calendar month of April. A young couple is seen exchanging rings. In the background is the Château de Dourdan, in the Essonne department of France. This castle became the property of Jean de Berry in 1385.
You can find more details about the background of this painting here.
This is part of the original miniature painting by the Limboug brothers from the 1400s representing the month of April.