Socrates of Constantinople
According to Socrates of Constantinople, when Christians were dismantling Alexandria's greatest temple, the Serapeum, in 391 AD, they noticed cross-like signs inscribed on the stone blocks. Pagans who were present said the sign meant "life to come", an indication that the sign Socrates referred to was the ankh; Christians claimed the sign was their own, indicating that they could easily regard the ankh as a "crux ansata".