Valentin von Rätien was a 5th-century bishop, monk, and abbot who served as a missionary for the papacy. He traveled to the region of Rhaetia, which encompasses parts of modern-day Switzerland, Bavaria, and Tyrol, to spread his faith. After his period of missionary work, he lived as a hermit in Zenoburg, located in Merano within South Tyrol. He is recognized as one of the early patrons of Passau.