Hmm... "49 AD: emperor Claudius expels Christians from Rome" but Egyptian Christianity didn't begin until about 70 AD.
54AD : Tiberius Claudius poisoned by his wife/niece Agrippina and her son Lucius Domitius (AKA Nero) becomes emperor.
And Apostle Mark began his ministry in Egypt in 54AD, although his church (Egyptian Coptic) wasn't formally founded until after his martyrdom in Alexandria in 68AD.