Sebastianus is a name that can refer to various historical and cultural figures, most notably Saint Sebastian, a Christian martyr from the 3rd century. He is often depicted in art as a young man tied to a tree and shot with arrows, symbolizing his steadfast faith. His feast day is celebrated on January 20. In addition to the saint, the name Sebastianus has been used in various contexts, including literature and music. It is derived from the Latin name "Sebastianus," which means "from Sebastia," a city in ancient Cappadocia, now part of modern-day Turkey.