_Christopher Amberger_ (German: 1490-1563).
This painter, who worked at Augsburg, probably studied under
Hans Burgkmair, and the painting of Hans Holbein the younger
had an evident effect on his style, so much so that his works
have been sometimes mistaken for those of Holbein. In 1532 he
painted the portrait of Charles V.; and Sandrart tells us that
this portrait was considered by the Emperor equal to any of the
pictures painted of him by Titian. He certainly honoured the
artist by giving him a gold chain and medal on the occasion
(Bryan's _Dictionary of Painters_).