The Mona Lisa is one of the most famous paintings.
1907, w, The Younger Set Chapter 8, “ My tastes,†he said, still smiling, “ incline me to the garishly sunlit side of this planet.†And, to tease her and arouse her to combat : “ I prefer a farandole to a nocturne ; I'd rather have a painting than an etching ; … â€
(uncountable) The action of applying paint to a surface.
Artistic painting often takes longer then utilitarian house - etc. painting.