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(born c. 903died Jan. 30, 969) Tsar of Bulgaria (927–969). The second son of Simeon I, he inherited the throne on his father's death in 927. Early in his reign, Peter faced revolts by his brothers, which were suppressed, and he also endured raids by the Magyars, who crossed Bulgaria on their way to the Byzantine Empire. His reign, however, was generally peaceful, and he made important gains against the Byzantines, receiving the title emperor from them. He also forced the Byzantines to recognize the independence of the Bulgarian church, and he married the granddaughter of the Byzantine emperor Romanus I Lecapenus. In 965 war broke out with the Byzantines; Peter subsequently suffered a stroke and retired to a monastery, where he died two years later. Canonized by the Bulgarian Orthodox church, Peter was deeply religious and an active church builder. During his reign, the Bogomil heresy first appeared.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Peter I, visit Britannica.com.