Pope Nicholas I, called Nicholas the Great, was the bishop of Rome and ruler of the Papal States from 24 April 858 until his death. He is remembered as a consolidator of papal authority, exerting decisive influence on the historical development of the papacy and its position among the Christian nations of Western Europe. Nicholas I asserted that the pope should have suzerainty over all Christians, even royalty, in matters of faith and morals.
Reproduction of a bull of Nicholas I
Seal of Lothair II
13th-century depiction of the interrogation of Photius I
Lothair II was the king of Lotharingia from 855 until his death in 869. He was the second son of Emperor Lothair I and Ermengarde of Tours. He was married to Teutberga, daughter of Boso the Elder.
Seal of Lothair II