Saint Peter, King of Bulgaria, was the son of the militant Bulgarian prince Simeon. St Peter was distinguished for his Christian piety, and he often turned to St John of Rila (August 18, October 19), asking his prayers, spiritual guidance and advice.
King Peter concluded peace with Byzantium on terms advantageous for Bulgaria. He also gained recognition from the Patriarch of Constantinople for the autonomy of the Bulgarian Church, and the affirmation of a Patriarchal throne in Bulgaria, benefiting all the Bulgarian Church.
St Peter aided in the successful extirpation of the Bogomil heresy in his lands. He died in the year 967, at fifty-six years of age.