new game

Here is what's gonna happen; every week i will talk abnout a famous painting. I will give u different clues. at the end of the week, everyone puts there answer in a post, and whoever's right , wins! Easy enogh? Great! (you are allowed to use the internet).
                                 
                                 Artist: Leonardo Da Vinci
                                  Year: 1503
                                   Painted in Florence, Italy.
                                   One of the most famous paintings ever!

Think you know? Post it!!!!!!!