Worth1000.com always holds these Photoshop contests. One of their latest was to place celebs in Renaissance period art

Here are some of my favorites
Viggo Mortensen as Durer in his Self PortraitViggo Mortensen as Durer in his Self Portrait
Kate WinsletKate Winslet
Jack BlackJack Black
Natalie PortmanNatalie Portman
Angelina Jolie and Maddox as Madonna and ChildAngelina Jolie and Maddox as Madonna and Child
Colin FirthColin Firth
Kate WinsletKate Winslet
Owen WilsonOwen Wilson
Mr. Bean.....I know its not Renaissance but its funnyMr. Bean.....I know its not Renaissance but its funny