Many scenes of nude women throughout. Firstly to illustrate the sinfulness of Nero's feast. Later vague nudity of the martyrs.

People are crucified and burned alive.

Lots of blood and body parts sticking out.

Dismembered body parts of the martyrs shown.

No, as far as I know of.

A few instances of a character getting drunk of wine.

Lions attacking and tearing apart people (tearing not shown). People being burnt alive. People commiting suicide.