What is a concentration?

So what is a concentration? AP defines a concentration as, "A body of work unified by an underlying idea that has visual coherence." This weekend you will explore the Internet and find a few 'concentrations.'  You will need to follow the directions on the handout and submit it to your personal art blog. Here is an example of what I am after:

Amedeo Modigliani - http://en.wikipedia.org/wiki/Amedeo_Modigliani

Modigliani was a figure painter that elongated the form.  Clearly the majority of his work is of the human form with a focus on his muse, Jeanne Hebuterne. I have always been very taken with their story.

Jeanne met Modigliani when she was eighteen years old and she soon became his lover and muse. He painted her red hair, sinuous body and long neck many times.

She became pregnant and gave birth to a daughter. The couple were quite fond of one another and Jeanne put up with Amedeo's hedonistic lifestyle, caring for him and supporting him.

When she was nearly full term with their second child when Modigliani died. Jeanne was completely heart broken and committed suicide by walking backwards out of a top floor window. Jeanne was only twenty-one years old. So sad!

The color palette that Modigliani uses in his work is muted.  The element of color does not get in the way of the work and allows the viewer to focus on the form.  Emphasis seems to be important in his work as most of the forms are centrally located.