| AD 1212 - The German Empire, Muwahid Caliphate, Ayyubid Sultanate and East Asia Colin McEvedy's The Penguin Atlas of Medieval History , pg. 69 |
| AD 1212 - The German Empire, Muwahid Caliphate, Ayyubid Sultanate and East Asia Colin McEvedy's The Penguin Atlas of Medieval History , pg. 69 |