“Agnus Dei” – Lamb of God

A Latin term meaning Lamb of God, and originally used to refer to Jesus Christ in his role of the perfect sacrificial offering that atones for the sins of humanity. The Lamb Cross or Agnus Dei Cross portrays a lamb marching from right to left carrying a cross. The cross is sometime replaced with victory flag.

Also See: http://en.wikipedia.org/wiki/Lamb_of_God