Madonna of Bruges, 1501-04
Marble

Onze Lieve Vrouwekerk, Bruges, Belgium
My favorite Michelangelo sculpture is the small statue of an angel said to have been purchased in Bologna, Italy, and later donated to the Metropolitan Museum of Art in New York by Mrs. Basil E. Frankweiler. But this one is pretty good too.
Previous Advent posts:
2003: Whence is that goodly fragrance?
2004: Madonna and Child
2005: The Beatles Third Christmas Record
2006: A Carol
2007: Madonna in the Meadow
2008: Happy Xmas (War is Over)
2009: Singing Christmas Carols