late 15th century (1493) Germany
female nude by Albrecht Dürer
Bayonne, Musée Bonnat
http://commons.wikimedia.org/wiki/File:Albrecht_D%C3%BCrer_-_Female_Nude_-_WGA07033.jpg
I love these period nudes. They kind of triggered my reconsideration of my ideal of female beauty and helped me shed some of the preconceptions that I found rooted deeply in me (as in any other person living in the 21st century) - that a woman should aspire to have a flat belly, for example. You can see that these period nudes were idealized too, but I find the ideal that they represent to be a healthier and a more natural one (at least for most women).
