A second type of Arabian historiography is that in which an author combines the different traditions about one occurrence into one continuous narrative, but prefixes a statement as to the lines of authorities used and states which of them he mainly follows.
But, having already written the Discorsi and the Principe, he carried with him to this new task of historiography the habit of mind proper to political philosophy.
He made use of European sources, and with him Arabic historiography may be said to cease, though he had some unimportant successors.
This masterpiece of historiography was composed in 1225 or 1226 by a professional poet of talent at the request of William, son of the marshal.
Christianity from the first had forced thinking men to reconstruct their philosophy of history, but it was only after the Church's triumph that its point of view became dominant in historiography.