[MartinMansson]

Saint-Omer was heavily active in the wool and clothing trade at the end of the 12th century, it also was situated closer to the coast at this time. Sometimes, sadly, i have had to omit some locations in order to not clutt the map too much. Maybe i should look over the Calais region again. The port from France to England was probably in the Wissant region, as the Via Francigena went through here. I did not have a source of what city/port existed here at the time, some sources cites Sombre as an existing port. Calais existed during this time frame, but the extent to which it was used have been hard for me to establish. Saint-Omer was the only trading settlement i really had any good claims putting on the map.

[ucaetano]

Calais was a massive trading center during the English occupation, 1350 onward. It wasn't necessarily the port itself, but where most of the trade took place.

But if you're looking at before that, then Calais was less relevant.