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Methodius alone

Methodius now continued the work among the Slavs alone; not at first in Great Moravia, but in Pannonia (in the Balaton Principality). Political circumstances in Greater Moravia were insecure. Rastislav had been taken captive by his nephew Svatopluk in 870, then delivered over to Carloman of Bavaria, and condemned in a diet held at Regensburg at the end of 870. Meanwhile, the East Frankish rulers and their bishops decided to try and depose Methodius. The archiepiscopal claims of Methodius were considered so threatening to the rights of Salzburg that he was captured and forced to answer to East Frankish bishops: Adalwin of Salzburg, Ermanrich of Passau, and Anno of Freising. After heated discussion, they declared the intruder deposed, and ordered him to be sent to Germany. There he was kept prisoner in a monastery for two and a half years.

Notwithstanding strong representations of the Conversio Bagoariorum et Carantanorum, written in 871 to influence the pope, though not conceding this purpose, Rome declared emphatically for Methodius. He sent a bishop, Paul of Ancona, to reinstate him and punish his enemies, after which both parties were ordered to appear in Rome with the legate.Thus in 873, new Pope John VIII (872-882) secured the release of Methodius, but instructed him to stop using the Slavonic Liturgy.