Note 046
The conquests of Robert Guiscard and Roger I., the exemption of Benevento and the xii provinces of the kingdom, are fairly exposed by Giannone in the second volume of his Istoria Civile, l. ix. x. xi and l. xvii. p. 460 - 470. This modern division was not established before the time of Frederic II.]
The History Of The Decline And Fall Of The Roman Empire Fall In The EastChapter 56