Keywords: Hugo-de-Groot-Grollæ-obsidio-cvm-annexis-anni-M-DC-XXVII MG 0149.tif Castellum Anglorum diagram layout and height profile of a fortress Castellum Anglorum diagram met hoogteprofiel van een modelfort PD-Art-100 D-Vorm Peace Palace Library collection Hugo de Groot 1583-1645 Grollæ obsidio cvm annexis anni M DC XXVII / Hvg Grotio auctore Publisher Amstelredami apud Gvilielmvm Blaevw Printer Blaeu Willem Jansz Amsterdam 1608-1639 Institution Peace Palace Library Uploaded with GWToolset Hugo-de-Groot-Grollæ-obsidio-cvm-annexis-anni-M-DC-XXVII_MG_0149 http //www peacepalacelibrary nl/images/wikimedia/20-feb/TMD-712-064288366_MG_0149 tif Prints from Hugo de Groot Grollæ obsidio at the Peace Palace Library Images from the Peace Palace Library Fortresses in unidentified countries altitude profiles |