Hans Holbein the Younger is probably best know for his portrait work in the court of Henry the VIII, however he is undoubtedly one of the most powerful artists of the 16th century. I prefer his early work, when he not only focused on the sitter in a portrait, but also dealt with pattern, texture and color just as lovingly.
From the wood, the satin and the peeling paint in the portrait shown here, Holbein had an exacting eye and hand. If you are interested in a very interesting bio and views of his other works and periods http://en.wikipedia.org/wiki/Hans_Holbein_The_Younger has a very interesting article and further websites to explore.
“Every portrait that is painted with feeling is a portrait of the artist, not of the sitter.”- Oscar Wilde