The Virgin and Child with St Anne and St John the Baptist

The Virgin and Child with St Anne and St John the Baptist, sometimes called The Burlington House Cartoon, is a drawing by Leonardo da Vinci. The drawing is in charcoal and black and white chalk, on eight sheets of paper glued together. Because of its large size and format the drawing is presumed to be a cartoon for a painting. No painting by Leonardo exists that is based directly on this cartoon.

• http://en.wikipedia.org/wiki/The Virgin and Child with St Anne and St John the Baptist