The Gospel of Joseph of Arimathea was written in Coptic, however some sceptics purported that it was a hoax.
Behind the scenesEdit
The package of Indiana Jones and the Last Crusade: The Graphic Adventure contains a "translation table" with combinations of Greek and Coptic characters. These form the code that Indy must show near the beginning of the game, although they are not identified as Coptic in dialogue.
The bar above each letter signifies that they are not letters of a text, but they are characters with a numerical value (eg. A=1, B=2 etc).