Astrolabe, c. 1597, Johannes Bos, Flemish, brass - Art Institute of Chicago - DSC09727

Exhibit in the Art Institute of Chicago, Chicago, Illinois, USA. This artwork is in the public domain because the artist died more than 70 years ago. Photography was permitted in the museum without restriction.
Email correspondence with the Art Institute of Chicago (by User:MartinPoulter) confirms that this item was on loan from the Adler Planetarium and is not part of the Art Institute collection.