Caesar was deeply engaged with the foreign customs he witnessed, from the drinking habits of the Gauls, including the barbaric prohibition of wine among some tribes, to the religious rituals of the Druids. His is a wonderfully Roman vision of people whom he clearly did not entirely understand, but it still forms the basic reference point for modern discussions of the culture of pre-Roman northern Europe – an irony, given that it was a culture he was in the process of changing for ever.