Bauhütte 
Dear Scbarry, what a pleasure to know that you are back ! I'm glad and happy that you are at work again. Now, for that word, i can't unfortunately tell you how to translate it. Roughly, it is the workshop of all the different professions involved in building and restoring the cathedral  architects, sculptors, masons, plasterers, stone-carvers, glass-makers... There is little definition on the official website  http://www.oeuvre-notre-dame.org/index2gb.htm. Sorry !