If I was to dock a trading ship in Western Europe (let's say France to be specific) in the late 1000s, what kind of buildings would I expect to see/visit?
While waiting for a more specific answer, I wrote about the crusader port of Acre here:
What would be in and around a medieval port?
It's the opposite end of the Mediterranean and a bit later in time, but it was pretty much a French port, so maybe that will be helpful.