Capuchin Franciscan Friars of Australia: Fidelis of Sigmaringen: Brief illustrated biography of the Capuchin priest and martyr.
Fidelis of Sigmaringen, OFM Cap.: Biographical essay.
Patron Saints Index: Fidelis of Sigmaringen: Profile of "the poor man's lawyer."
St. Fidelis of Sigmarengen, Martyr: From Butler's Lives of the Saints.
St. Fidelis of Sigmaringen: Former lawyer who joined the Capuchins, and was sent as a missionary to the Calvinists. Martyred in 1622.