""Gregory VII: A Tragedy"" is a historical play written by Richard H. Horne and published in 1840. The play is based on the life and struggles of Pope Gregory VII, who served as the head of the Catholic Church from 1073 to 1085. The play portrays the conflict between Gregory VII and Holy Roman Emperor Henry IV, who opposed the pope's reforms and authority. The play also explores the themes of power, corruption, and the struggle for religious and political...