Beatus of Lungern was a second-century monk and hermit credited as the first apostle to the Helvetii tribe. Originally from Ireland, he was reportedly baptized in England by Barnabas and later ordained in Rome by Peter. Alongside his companion Achates, he traveled to the region of modern-day Switzerland to spread Christianity. He eventually settled as a hermit near Lake Thun, where he lived within the St. Beatus Caves until his death around 112 CE.