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Keywords from Image Description:
Siege of Grol Groenlo Grolla Obsessa et Expugnata J.Blaeu. en Map of the Siege of Grol Groenlo in by Frederick Henry Prince of Orange Map by Blaeu nl Kaart van het Beleg van Grol Groenlo in door Frederik Hendrik Kaart door Blaeu Atlas van Loon Blaeu Public Domain Siege of Groenlo Bleau small PDold Maps by Willem and Johannes