Biskupin

Biskupin group of Lusatian Culture (not Slavic) Poland, 747 B.C.E. to 475 B.C.E,Iron Age fortress located 56 miles northeast of Posnan, Poland.

Location coordinates: 52°47'17.8"N 17°44'41.5"E
52.788276, 17.744872

Elevation is c. 82 meters (268 feet) above sea level.

Materials: wood construction columns, beams, wall and roof construction; thatch roof.

Photomontage of Biskupin fort upon aerial photo of actual lake site in northern Poland.

Data for CG model:
1. https://web.archive.org/web/20161031152536/http://www.biskupin.pl/asp/pl_start.asp?typ= 13&menu=169&artykul=57&akcja=artykul
2. https://www.google.com/search?q=biskupin+history&source=lnms&tbm=isch&sa=X&ved=0 ahUKEwjrg9fHmojaAhVW3mMKHRMYC9oQ_AUICygC&biw=1276&bih=1507#imgdii= jgE0mlzzgIZn7M:&imgrc=T0q_QrDwX_AeCM:
3. http://structuralarchaeology.blogspot.com/2008/12/16-world-of-woos.html