 However most art historians continue to accept the traditional Mosan attribution, and relate the style to the other works mentioned above.The basin is across at the top, tapering slightly towards the base, and is variously described as of brass or bronze.It was made by lost wax casting, with the basin cast in a single piece; the size was not necessarily exceptional, as both church bells and cauldrons for large households were probably cast at comparable sizes; some church doors cast in a single piece, though flat, were much larger.