Marinus I (or Martin II), Pope between December 16, 882- May 15, 884.

He succeeded John VIII in the pontificate about the end of December 882. Before becoming Pope, he served as Bishop of Caere , which made his election controversial, because, at this stage of history, a bishop was expected never to leave office to move to another see. On three separate occasions he had been employed by the three popes who preceded him as legate to Constantinople, his mission in each case having reference to the controversy excited by Photius, Patriarch of Constantinople. Among his first acts as pope were the restitution of Formosus, cardinal bishop of Porto, and the anathematizing of Photius. He died in May or June 884, his successor being Adrian III.

Original text from the 9th (1880s) edition of an encyclopedia. Please update as needed.