Drawings of Classical Statues with Pencil

I believe that everyone has to learn how to draw in a classic way, learn to give form and texture, learn to see and draw the light, learn how to depict likeness.
I have been working in museums for many years. They are a source of inspiration and knowledge in many different levels. I couldn't help myself to not draw a series of busts from the Greek and Roman times. All busts are at the British Museum. This is a selection of five.