Sources
- http://www.fastfloors.com/media/catalog/Ceramic_Tile/Laufen/Cairo/Ancient_Stone.jpg
- http://www.genealogyintime.com/GenealogyResources/Wallpaper/Vintage_Stone_Wall_Series_1/images
/ancient_Roman_tower_stone_wall.jpg
- http://upload.wikimedia.org/wikipedia/commons/thumb/8/88/Plato_Silanion_Musei_Capitolini_MC1377.jpg/
220px-Plato_Silanion_Musei_Capitolini_MC1377.jpg
- http://www.cosmiccradle.com/images/plato.jpg
- http://www.preservationnation.org/assets/slideshow/travel-sites/tours/mediterranean/greece/AthensGreece.jpg
- http://en.wikipedia.org/wiki/Plato