Rembrandt has a painting called The Night Watch. It is a wonderful painting and it was completed in 1642 and it is one of the most famous paintings in the world. An interesting thing about it is the fantasy weapon that Rembrandt painted into it. It is very similar to a Halberd or a Guisarme. But nobody knows if it was an actual weapon or just something that Rembrandt created out of his imagination.
If you want to learn more about polearms like this I have an article with pictures right here: Medieval Polearms
Well, it is an interesting thing and a unique weapon. Maybe at some point I will go ahead and forge one up just for fun.
The first picture shows the painting overall. And the second picture is a closeup of the weapon.