Behind his head are the two Greek letters chi and rho and that tells me at once who he is, because they're the first two letters of the word Christos, and this is in fact Christ.

在他头部后方还有两个希腊字母chi和rho, 这让我们立刻了解了这名男子的身份：这是希腊文christes的首字母，而我们所看到的正是耶稣最早的图像之一。