The Christian cross, seen as a representation of the instrument of the crucifixion of Jesus Christ, is the best-known religious symbol of Christianity. It is related to the crucifix (a cross that includes a usually three-dimensional representation of Jesus' body) and to the more general family of cross symbols.
The cross-shaped sign, represented in its simplest form by a crossing of two lines at right angles, greatly antedates, in both East and West, the introduction of Christianity. It goes back to a very remote period of human civilization. It is supposed to have been used not just for its ornamental value, but also with religious significance.