Public Domain Images

The images in this slide-show are in the public domain.

http://commons.wikimedia.org/wiki/File:Pieter_Bruegel_d._%C3%84._024.jpg

http://www.iwm.org.uk/collections/item/object/205133262

http://en.wikipedia.org/wiki/Sign_language#mediaviewer/File:Hole%C4%8Dkova,_n%C3%A1pis_ve_znakov%C3%A9_%C5%99e%C4%8Di.jpg