Why German State Head is called as Chancellor and not as Prime Minister?
Chancellor is the official title used by people whose civilisations have directly or indirectly risen out of the Roman Empire. The title is borne by officers of various degrees of dignity. The head of government in Germany is also called kanzler (chancellor) but the name of the office today is bundeskanzler (federal chancellor). This position is equivalent to that of a Prime Minister and is elected by the German Parliament.