The lessons of his mentor inspired Peter to live as a monk for many years, embracing a lifestyle of asceticism, simplicity, and prayer. His simple monastic life came to an end, however, after the death of Archbishop John of Ravenna in 430. In Ravenna, Peter was received warmly by the Western Roman Emperor Valentinian III, and his mother Galla Placidia. Peter exercised zeal and pastoral care in curbing abuses and evangelizing non-Christians during his leadership of the Church in Ravenna. Having returned to Imola in anticipation of his death, St. Peter Chrysologus died in 450, one year before the Church's official condemnation of monophysitism.