For good measure:
Vanilla
http://media.curse.com/Curse.Project...61/classic.jpg
Burning Crusade
http://www.emence.com/images/wow/scr...n%20Screen.jpg
Wrath of the Lich King
http://cdn.phun-ky.net/img/blog/img5...47be0ab3cf.jpg
We all know Cata .