"Praying Hands" by Albrecht Durer

One of the most recognizable art pieces of Albrecht Durer is his famous "Praying Hands."  My father, who studied under Angelo Di Benedetto in Denver at the Denver Art Academy of the 19050's, told me that the person who can draw 4 basic shapes - pyramid, box, ball and ribbon with proper lighting and values; make a rock look hard and water look wet; and draw the human body with those building blocks can draw anything.  In this case it is a very excellent model to use for the human hand.