Pope Nicholas I

Nicholas I (c. 800 – 13 November 867), or Saint Nicholas the Great, reigned as Pope from 24 April 858 until his death. He is remembered as a consolidator of papal authority and power, exerting decisive influence upon the historical development of the papacy and its position among the Christian nations of Western Europe. Nicholas asserted that the pope should have suzerain authority over all Christians, even royalty, in matters of faith and morals.

• http://en.wikipedia.org/wiki/Pope Nicholas I
• Pope Niccolò (Nicholas) I, The Great on www.findagrave.com