Concept
Version 10
Created by Boundless
Humanism
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Donatello - David - Florença."
http://en.wikipedia.org/wiki/File:Donatello_-_David_-_Floren%C3%A7a.jpg
Wikipedia
CC BY-SA.