I did this a couple of years ago. It’s a copy of a small panel painting by Raphael (6.7 × 6.7 inches) at the original size. Wikipedia says this about it (the original, of course):

The Vision of a Knight or The Dream of Scipio or Allegory is a small egg tempera painting on poplar by the Italian Renaissance artist Raphael, finished in 1504. It is in the National Gallery in London. It probably formed a pair with the Three Graces panel, also 17 cm square, now in the Chateau de Chantilly museum.

The theme is controversial. Some authorities intend the sleeping knight to represent the Roman general Scipio Africanus (236–184 BC) who was dreaming to choose between Virtue (behind whom is a steep and rocky path) and Pleasure (in looser robes). However, the two feminine figures are not presented as contestants. They may represent the ideal attributes of the knight: the book, sword and flower which they hold suggest the ideals of scholar, soldier and lover which a knight should combine.

I did it in egg tempera with oil glazes. More recent analysis by the National Gallery indicates that the original was actually an oil painting. Although it is by no means a perfect copy, I am mostly satisfied, as I think I managed to capture some portion of the sweetness of Raphael’s early work.