This is a 1/72 scale model based on a world war 2 German bunker. The bunker is inspired by a C-Regelbau: Nr. 1 design, as used in the west of Germany to defend against France during WW2.
Please post a picture of the result when printing this model, I don't have a printer and would love to see the result!
Edit: I included another door model, since I didn't like the initial one.
Leave a tip if you like my work :) I would love to make more of this kind of stuff, so please help me out :)