Michelangelo’s David-Apollo is the last major work by the artist, and was incomplete when he died in 1564. The marble sculpture is mesmerizing in its unfinished state, with chisel marks clearly apparent, and the surface not yet smoothed out or defined with the minute detail that Michelangelo’s completed works are known for. Meant to depict the Biblical David who slew Goliath, the unfinished mound that David has his foot on was to have been sculpted into Goliath’s head. A main attraction of this sculpture, even in its rough, incomplete state, is the dramatic curve of the upper body, with the uplifted arm, and the long hair flowing down the back. David-Apollo is on temporary loan to the United States from Italy, and while here it is the most substantial of any Michelangelo work on American soil. The sculpture is bringing crowds to the National Gallery of Art in Washington, D.C., where it is on exhibit through March 3, 2013.