originally from pl.wikipedia; description page is (was) here. (SVG-version ofhannover_landeshauptstadt_wappen.jpg from Deutsche Gesellschaft für Flaggenkunde:
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CoatofArmsof Hehlen Source: www.hehlen.de Autor: Heinrich Steding aus Holzminden (Quelle: Hauptstaatsarchiv Hannover) Converted into PNG format, modified