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15851600s-1620s1630 ca
a Dutch spectacle-maker from Middelburg associated with the invention of the first optical telescope. Janssen is sometimes also credited for inventing the first truly compound microscope. However, the origin of the microscope, just like the origin of the telescope, is a matter of debate. Over the years there have been claims Zacharias Janssen invented the telescope and/or the microscope in Middelburg between 1590 and 1618.
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Zacharias Janssen15851600
 
16291630 ca

John Rose Sr.unknown1580
 
1629unknown
 John Rose was the name of a father-and-son pair of luthiers residing in the Bridewell area of Lon...
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