In AD 333 an anonymous traveller crossed the Roman Empire from Bordeaux to Jerusalem and back. The journey took almost a year, and included „pagan“, Jewish and Christian /loci/ (sites) which the author referred to by alluding to /loci/ in the oral or written tradition. But which /loci/ resonate as /lieux de mémoire/ with the author and her or his audience? How does this resonate with applying „resonance theory“? And can this method help us to solve the puzzle of the religious identity, and the gender, of the traveller?