The Enigmatic Master of the Aachen Altarpiece The identity of the Master of the Aachen Altarpiece remains one of art history’s most enduring mysteries, a phantom presence haunting the corridors of the late Gothic era. Active primarily in Cologne between 1495 and 1520, this artist—whose true name has vanished into the annals of time—produced a monumental triptych housed within the Aachen Cathedral treasury, cementing his place as argua…