Ichthus

The symbol of the Ichthus ranks probably first of importance among Christians.

Ichthus
From Wikipedia, the free encyclopedia
Ichthus is a Christian acronym of Greek words: I=Jesus, Ch=Christ, Th=Theou (God's), U=Uios (Son), S=Soter (Savior). Thus, IChThUS means "Jesus Christ, Son of God, Savior".