""Pius The Seventh: 1800-1823"" is a historical biography written by Mary Helen A. Allies and published in 1897. The book chronicles the life and times of Pope Pius VII, who served as the head of the Catholic Church from 1800 to 1823. Allies presents a detailed account of Pius VII's early life and rise to power, his struggles with Napoleon Bonaparte, and his efforts to reform and modernize the Church during his tenure. The book also explores the political...