"Willem Janszoon Blaeu (Dutch pronunciation: [ˈʋɪləm ˈjɑnsoːm ˈblʌu]; 1571 – 21 October 1638), also abbreviated to Willem Jansz. Blaeu, was a Dutch cartographer, atlas maker and publisher. Along with ...
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his son Johannes Blaeu, Willem is considered one of the notable figures of the Netherlandish/Dutch school of cartography in its golden age (the 16th and 17th centuries)." - (en.wikipedia.org 12.11.2019)