Intolerance

Intolerance is a three hour silent film from 1916.  It is actually pretty good and has a surpriseingly engageing plot.  I managed to watch it all in one sitting, but you may want to break it up into two.  It actually encompasses four different plots from four different time periods, all with the theme that intolerance is bad.  I picked it because it is the only film I could find that has scenes of ancient Mesopotamia.  The Mesopatamian plot revolves around the fall of Babylon but also includes two tales of unrequited love.  The costumes and scenery were all very good considering the time period, although the women all had flapper hairstyles.  You can watch the entire movie for free online, right here.