Keywords: Hugo-de-Groot-Grollæ-obsidio-cvm-annexis-anni-M-DC-XXVII MG 0150.tif Castellum Frisiorum and Castellum Hollandorum model designs for a Frisian and a Hollandic castle with height profiles Castellum Frisiorum en Castellum Hollandorum Fries en Hollands model van een fort met hoogteprofielen 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_0150 http //www peacepalacelibrary nl/images/wikimedia/20-feb/TMD-712-064288366_MG_0150 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 |