Christian Symbol - Ichthus / Fish : The ichthys or ichthus from the Greek ikhthýs (ἰχθύς 1st cent. AD Koine Greek [ikʰˈtʰys], "fish") is a symbol consisting of two intersecting arcs, the ends of the right side extending beyond the meeting point so as to resemble the profile of a fish. The symbol was adopted by early Christians as a secret symbol. It is now known colloquially as the "sign of the fish" or the "Jesus fish". The first appearances of the ichthys symbol in Christian art and literature date to the 2nd century AD. The symbol's use among Christians had become popular by the late 2nd century, and its use spread widely in the 3rd and 4th centuries. This Photochromatic postcard is in good condition. CRG1868.