Quirinus is an ancient Roman god associated with war and the protection of the state. He was often considered a guardian of the Roman people and was linked to the founding of Rome. Quirinus was typically depicted as a warrior, sometimes wearing a helmet and carrying a spear. Originally, Quirinus may have been a Sabine deity, later integrated into Roman religion. His worship included various rituals and festivals, particularly the Quirinalia, celebrated on February 17. Quirinus was also associated with the Roman pantheon, often identified with the god Mars in later traditions.