Many of us know that majority of the ancient artworks found in museums and private collections around the world are priceless. Because of the uniqueness of some artworks, it's difficult to put a price tag on them. However, there are hefty price tags put on some artworks that even the rich will never be able to afford. Without any further ado here are the most expensive paintings in the world....Painted by Leonardo da Vinci this priceless piece of art is one of a kind and one of the most famous paintings as well. However, it was insured for a whopping $100 million in 1962 which is equivalent to be around $860 million today