40
Alexander Mosaic from the House of the Faun, Pompeii
https://www.astro.rug.nl/~weygaert/alexandermosaic.html
http://realhistoryww.com/world_history/ancient/Misc/Med/Alexander_mosaic/The_Alexander_Mosaic.htm
http://www.bbc.co.uk/history/ancient/romans/pompeii_art_gallery_07.shtml