Correction: Vice-versa: The iron trade in the western Roman Empire between Gaul and the Mediterranean.

[This corrects the article DOI: 10.1371/journal.pone.

Vice-versa: The iron trade in the western Roman Empire between Gaul and the Mediterranean.

Starting from the second century BC, with the fast expansion of the Roman Empire, iron production and consumption developed exponentially in north-western Europe. This rapid growth naturally led to an increase in trade, that still remains to be studied encompassing a broad scope, so as to not neglect long-distance exchanges. This is today possible by taking advantage of the progress made in the past 40 years in archaeology and archaeometallurgy.