The Ambassadors (1533) is a painting by Hans Holbein the Younger in the National Gallery, London. As well as being a double portrait, the painting contains a still life of several meticulously rendered objects, the meaning of which is the cause of much debate. It is also a much-cited example of anamorphosis in painting.
The astronomical instruments on the top shelf are shown in greater detail here:
The instrument on the right is a torquetum
The small instrument in the middle front is a multi-faced sundial
Any suggestions for the other instruments?
Update: A detailed article about the instruments in the painting from the Journal of the Royal Astronomical Society of Canada