This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
HugodeGrootGrollobsidiocvmannexisanniMDCXXVII MG .tif Information fr en Typus orthograficus Castellorum in obsidio Grollae model for the moat and defended fortification in the siege of Groenlo nl Typus orthograficus Castellorum in obsidio Grollae model voor de gracht en verdediging bij het beleg van Groenlo PDArt DVorm Peace Palace