Fidelis of Sigmaringen was a 16th-century German Capuchin friar and missionary who played a significant role in the Catholic Counter-Reformation. Born Mark Roy in Sigmaringen, he initially studied law and philosophy, eventually practicing as a lawyer known for his integrity and support of the poor. Seeking a more spiritual life, he joined the Order of Friars Minor Capuchin, receiving the name Fidelis. He was later sent to preach in the Graubünden region, where his successful efforts to convert people to Catholicism led to intense opposition from local Calvinists.
Life and martyrdom

After his ordination in 1612, Fidelis served as a guardian and missionary. While preaching in the Swiss territories, he faced increasing hostility from religious opponents. In April 1622, while traveling near Seewis, he was confronted by Calvinist soldiers. Despite being urged to renounce his faith, he remained steadfast. The soldiers killed him, inflicting multiple wounds and striking him with a sword. He died while praying for his attackers.
Veneration and legacy

Fidelis was canonized in 1746. Following his death, his body was reported to be incorrupt, and his remains were placed in reliquaries in Coire and Weltkirchen. His death reportedly led to the conversion of the minister who participated in his killing. The Catholic Church commemorates him as a saint on April 24.
