Seal of the Knights Templar

The Latin inscription reads:
(Seal of the Knights of Christ)

Middle of the 12th century.
Held by the Centre Historique des Archives Nationales, Paris, France.

Templars in Armies and Enemies of the Crusades 1096-1291 by Ian Heath, based on this seal
See also Fresco of a Templar knight at Cressac
Other 12th Century Illustrations of Costume & Soldiers