books.google.com - "Rituals of Islamic Monarchy is a history of the oath of allegiance by which the caliph was recognised at his accession. It begins in pre-Islamic Arabia and traces the development of a formal ceremonial of Islamic monarchy in Syria and Iraq during the 7th-9th centuries CE. It examines how the caliphs...http://books.google.com/books/about/Rituals_of_Islamic_Monarchy.html?hl=fr&id=9AqX8H9kWoEC&utm_source=gb-gplus-shareRituals of Islamic Monarchy
