In case you're interested in German, or in Middle High German, and you don't know it yet, let me introduce you to the Wörterbuchnetz. This is a webpage that gives you access (and a search function) to a large number of German dictionaries and the Middle High German Word Database (MHDBDB is the German acronym) plus a few encyclopaedias. It is a wonderful resource if you're looking for meanings of words in the past - there, one of the Sources with capital S is the Grimm'sches Wörterbuch, and it's all in there as well.

An unexpected treasure trove is the Rechtswörterbuch, too - there's laws and regulations cited in there which also include medieval texts, and you can search for the names of jobs, for instance. There's a lot in there about the Schneider (tailor); the Färber (dyer) is only mentioned as a dialect term for a crook. So it's not complete, and not perfect, but if you like these things, it might still keep you entertained for a good while!