The only bit I know about Alexandria was that it was a major early hub of Jewish scholarship. But prolly lots of other stuff, like …. ????
I stand to be informed.
Grok has things:
“Yes, Alexandria Was a Major Christian Center Before the Muslim Conquest
Alexandria, Egypt, was one of the most prominent hubs of early Christianity for nearly six centuries, from its founding in the 1st century AD until the Arab Muslim conquest in 641 AD. It served as the seat of the Patriarchate of Alexandria—one of the five original “pentarchy” sees of the early Christian world (alongside Rome, Constantinople, Antioch, and Jerusalem)—and exerted profound theological, scholarly, and missionary influence across the Mediterranean and Africa. By the 7th century, Egypt (including Alexandria) was predominantly Christian, with the faith deeply embedded in urban and rural life, despite internal doctrinal disputes and Byzantine persecutions.”
It was the center of Gnosticism.
That’s not a good thing, BTW.