Last Years and Veneration
During his reign Peter contended with the spread of the Bogomil heresy, seeking counsel against it from the hierarchs of the Church. After a second invasion of his land by the Rus prince Sviatoslav in the year 969, he suffered a stroke; he laid down the throne, was tonsured a monk, and died on January 30 in the year 970.
The Bulgarian Orthodox Church venerates him among its saints, and later rulers seeking to restore Bulgarian independence took his name to claim his legacy.