The obsolescence in the Middle Ages

During the Middle Ages, the technique of lost-wax casting fell into disuse. It survived sporadically in Byzantium primarily for the execution of cathedral doors which were imported into Italy to Amalfi, Montecassino, Rome, Monte Sant’Angelo, Atrani, Salerno, Venice, and Canossa among other centers.
During this period in Italy, bronze works were made under the supervision of Byzantine workers.
The technique completely disappeared in the western territories of what had once been the Roman Empire.