English summary: Bernhard Lang presents the first readable translation of an early Christian novel dating from the time of the Roman empire. The novel creates fascinating scenes of Peter confronting an audacious opponent. This opponent, Simon Magus, pretends to be able to do miracles like Peter, and has already convinced many Christians. In Rome, Peter und Simon compete publicly. Peter is able to do greater miracles than Simon. With this victory, he wins back the congregation to Jesus Christ. But when Peter preaches chastity to married Roman women, he meets with strong opposition - and is...