Nero Burning ROM was titled after Nero burning Rome.

Nero fiddled as Rome was burnt onto a CD-RW.

there's a lot of writing about how the Christians were coding their language at this time because writing about the god king was sure to be death, especially if you're trying to warn others

Anyways the code for number of the beast, 666 or 616 was basically Nero. He killed a lot of Christians. Revolations is code for the prediction of the fall of Rome

be real and think of that bronze age world and consider how much Rome controlled the world of people who could read and write. It was something very special to write a long message. It would be something that stands out like a big screen tv does to us. they had to hid meaningful things inside fantastic stories so when their caught, they have a way out

Just start with Wikipedia there's no single source, it's pretty widely recognized.