Saint Hubertus or Hubert (c. 656–727 A.D.) became Bishop of Liège in 708 A.D. He was a Christian saint who was the patron saint of hunters, mathematicians, opticians, and metalworkers. Known as the Apostle of the Ardennes, he was called upon, until the early 20th century, to cure rabies through the use of the traditional St Hubert's Key.Saint Hubertus was widely venerated during the Middle Ages. The iconography of his legend is entangled with the legend of Saint Eustace.