The Benedictine Ring

 The meaning of the letters on the ring

The vertical beam of the Cross: C.S.S.M.L. = Crux Sacra Sit Mihi Lux (May the holy cross be the light to me).

The horizontal beam of the Cross also has five letters: N.D.S.M.D. = Non Draco Sit Mihi Dux (Let not the dragon be my guide).

The four large letters at the angles of the Cross: C S P B stand for = Crux Sancti Patris Benedicti (The cross of the Holy Father Benedict).

Encircling the Cross around the right margin: V.R.S.N.S.M.V. = Vade retro Satana; nunquam suade mihi vana (Begone satan! Never suggest vain things to me).

Around the left margin: S.M.Q.L.I.V.B. = Sunt mala quae libas; ipse venena bibas (The drink you offer is evil; drink that poison yourself).

At top of the circle is the word PAX (peace).

The Benedictine Plaque is one of the oldest and most honored medals used by Christians. Due to the belief in its power against evil it is also known as the "devil-chasing medal".

As early as the 11th century, it may have initially had the form of Saint Benedict's cross, while it was used by the Roman Pope Leo IX. The reverse side of the medal carries the Vade retro Satana (Be gone, satan!) formula, which has been used by Christians to ward off evil since the 15th century. 

While only certain priests are allowed to perform exorcisms, everyone can use the Saint Benedict Medal, holy water, the crucifix and other prayers to ward off evil. The Saint Benedict Medal on both sides of the Celtic Cross is believed to be a powerful tool against evil influences.