The most important acts of Pelagius have relation to the Lombards, or to the Schism of the Three Chapters. Pelagius appealed for help from Emperor Maurice I against the Lombards, but the Byzantines were of little help. The Pope therefore turned to the Franks, who invaded Italy, but left after being bribed by the Lombards.
Pelagius labored to promote the celibacy of the clergy, and he issued such stringent regulations on this matter that his successor Pope Gregory I thought them too strict, and modified them to some extent.
Pope Benedict I
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Pope Gregory I