Hans Jansen and his son Sacharias, c1870. Some historians credit Sacharias Jansen, a Middelburg spectacle maker, with the invention of the telescope...
zacharias janssen (c.1588-c.1631), dutch optician, wood engraving, published in 1877 - zacharias janssen stock illustrations
Jansen', , 1830. Zacharias Janssen Dutch spectacle-maker associated with invention of the first optical telescope. From "Biographical Illustrations",...