Lebuinus was a 7th-century Christian missionary known for his efforts to spread Christianity in the region that is now the Netherlands and parts of Germany. He is often associated with the establishment of churches and the conversion of local tribes to Christianity. His work contributed significantly to the Christianization of the area during the early Middle Ages. Lebuinus is particularly noted for founding the city of Deventer, where he established a monastery that became a center of learning and religious life. His legacy is celebrated in various local traditions, and he is recognized as a saint in some Christian denominations.