The castle does not survive today -- it was already in ruins by the early 18th century -- .
The castle does not is depicted on old engravings as a large square tower , the Tour Grise , dominating the western flank of the hill .
The castle does not survive today -- it was already in ruins by the early 18th century -- but is depicted on old engravings as a large square tower , the Tour Grise , dominating the western flank of the hill .