Talk:The Indubitable Romans/@comment-10059141-20140228064054/@comment-10059141-20140301023219

A Caliph is the head of the muslim community after the death of the Prophet Mohammad. The first Caliph was Abu Bakar (like Peter was the first Pope) but subsequently there were instances of parallel lines of Caliphs. When the Mongols invaded Bagdad in 1258 they ended the line of Caliphs. However later rulers establish their own Caliphate. Sultans are heads of state, like Kings.