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:
Snitt festning nederlandsk system.svg cut through fortress built after the Dutch system Own Harald Hansen Norwegian Nkkel til tegningen over AB Vollgaten HI Ytre vollskrning BC Vollgatens indre skrning IK Eskarpemur CD Vollgangen KL Vollgravbunnen EF Bankett for kanoner LM Kontraeskarpemur FG Brystvernet MN Dekket vei GH Brystvernskrone