This seems like something many here would enjoy.http://boingboing.net/2015/12/15/public-domain-illustrations-fr.html
http://www.oldbookillustrations.com/illustrations/city-immortality/
This is a really good resource, too. Lots of armor and weapons and temple illustrations:http://www.betterworldbooks.com/the-complete-encyclopedia-of-illustration-id-9780517183403.aspx
