Saint Fermin, also known as Firmin, is a revered holy man and martyr traditionally venerated as the co-patron saint of Navarre, Spain. Born in Pamplona in the mid-3rd century to a Roman senator, he was converted to Christianity by Honestus and baptized by Saint Saturninus. After becoming a priest in Toulouse and serving as the first bishop of Pamplona, Fermin journeyed to northern Gaul, eventually becoming Bishop of Amiens, France, where he was martyred and beheaded on September 25, AD 303, possibly during the Diocletianic Persecution.
His memory is preserved through ancient texts, legends detailing miracles associated with his relics, and his enduring veneration in both Amiens and Pamplona. Fermin is famously celebrated in Pamplona with the annual "Sanfermines" festivities, which include the world-renowned Running of the Bulls. His supposed tomb in Amiens also became the site of the Abbey of Saint-Acheul, underscoring his significant religious and economic importance during the Middle Ages.