Bellona is the Roman goddess of war who is described as the companion, sister, or wife of Mars. Appius Claudius the Blind vowed a temple to Bellona that was erected on the Campus Martius. This was the site of meetings with foreign ambassadors. The fetiales declared war near the temple of Bellona, at the Column of War. The festival of Bellona was on June 3.
Priests of Bellona were called Bellonarii. In early years they wounded themselves when they made sacrifices to Bellona, although in later years the wounding on the March 24 dies sanguinis (day of blood), was symbolic.
- Smith - Dictionary of Greek and Roman Biography and Mythology - Bellona