As the story goes, King Henry IV loved to party so much that he would throw massive parties full of entertainment and all the food and drinks you could consume. One of the entertainers he hired was an artist that would draw sketches of all his guests.
As the night went on many of the guests had consumed way too much wine, the artist still continued to sketch the funny characters all the guests were becoming. In the morning King Henry found all the sketches and found them so hilarious he decided to have each guests sketch carved into the bridge.
Now this bridge is considered the first Facebook, everyone was able to go to the Pont Neuf and see all the Kings friends and see what a great time they all had together.