Balista or Ballista (died c. 261), also known in the sources with the name of `Callistus`, was one of the Thirty Tyrants of the controversial Historia Augusta, and supported the rebellion of the Macriani{dn|date=December 2013} against Emperor Gallienus. Balista was the praetorian prefect under Valerian. After Persians defeated and captured that .....
Found on
http://en.wikipedia.org/wiki/Balista
A balista was a large military engine, similar to a cross-bow, used by the ancients for hurling stones, darts and other missiles by means of a spring tightly drawn and then let loose.
Found on
http://www.probertencyclopaedia.com/browse/FYB.HTM
No exact match found.
