Confessor and Bishop
Alexander's life spanned two of the great third-century persecutions. His first imprisonment, under Septimius Severus, established him as a confessor before he ever came to Jerusalem; the sources record roughly three years in chains. It was as a confessor newly released that he made his pilgrimage to the holy places, and it was there that his episcopal ministry took its enduring form.
His joining to Narcissus as coadjutor bishop is noted in the tradition as a rare occurrence in the early Church, where the translation of a bishop from one see to another and the sharing of a single see were both uncommon. After succeeding Narcissus, Alexander governed Jerusalem until the Decian persecution, when he was arrested a final time and died in confinement.