La vierge aux raisins, ca. 1636

The Louvre, Paris
Not much to say about this one, really; it's the Virgin Mary sharing some grapes with a young Jesus. Perhaps she's saying, "People who aren't you use these to make wine."
Previous Advent posts:
2003: Advent 1955
2004: Virgin and Child
2005: Greetings!
2006: The Annunciation
2007: Blue Madonna
2008: All That I Want and Stars
2009: From Lamb, chapter 3