I always found art fascinating; the subtle hints, the imagery, etc.  I especially love the theories revolving around religious figures and the representations of Biblical events...such as the most famous The Last Supper.

While my class was doing homework, I stumbled upon this interesting find; the knife in The Last Supper.  Not many people notice it unless examined, but it certainly is strange once pointed out.  What do you guys think?  http://www.anomalies-unlimited.com/Religion/DaVinci.html