Uranic hemisphere, 1596.
© Science Museum / Science & Society Picture Library
Woodcut with explanatory text, showing a completed hemisphere from 'De fabrica, et usu hemisphaerii uranici' by Giovanni Paolo Gallucci (1538-c 1621), published in Venice in 1596. The book describes the method of constructing and using observational instruments and sundials. Gallucci helped to popularise the use of gnomonic (pertaining to sundials) instruments during the 16th century.