From the taking of the holy city of Jerusalem in the 7th century AD by Caliph Umar, to the collapse of the Ottoman Empire following the end of World War I, Christian popes, emperors and kings, and Muslim caliphs and sultans were locked in a 1300-year battle for political, military, ideological, economic and religious supremacy.

Some of the most significant clashes of arms in human history include the taking and retaking of Jerusalem and the collapse of the Crusader states; the fall of Constantinople; the sieges of Rhodes and Malta; the assault on Vienna and the 'high-water mark' of Ottoman advance into Europe; culminating in the Allied capture of Jerusalem in World War I, the final collapse of the Ottoman Empire, the dissolution of the sultanate and the caliphate, and the formation of modern Europe and the modern Middle East.

To explore this history is today’s guest, Simon Mayall, author of “The House of War: The Struggle between Christendom and the Caliphate.”