Peter Igneus was an 11th-century Italian Benedictine monk of the Vallumbrosian branch who achieved high ecclesiastical rank. Born in Florence, he served as the Abbot of San Salvatore in Fucecchio before being appointed a cardinal and eventually the Cardinal-Bishop of Albano. He was a prominent figure in the reform efforts of Pope Gregory VII, participating in significant diplomatic missions throughout Germany and France to combat simony. His nickname, meaning "fire-tried," originated from a successful trial by fire used to resolve a religious dispute in his home region.