The Second Age of the Crusaders Episode 10 "Frederick and the Recovery of Jerusalem"
The German Emperor Frederick II was an unusual medieval monarch. He shocked contemporaries by keeping a harem in his court at Palermo, and was excommunicated three times by the Pope. Yet he was the only monarch to succeed in recovering Jerusalem. Please take a look at my website nickholmesauthor.com where you can download a free copy of The Byzantine World War, my book that describes the origins of the First Crusade.