a normal xyz 20mm calibration cube but with a city on the inside —

Founded a normal xyz 20mm calibration cube but with a city on the inside models & stl files for printing
calibration comb
kjør_engineering
Flippe Tops
G Bell
Calibration Castle
3DPrintBeginner
cube in cube 1
hsiehty
cube in cube
hsiehty
Pumpkisaur
3D Kitchen
Cube  basic geometric shape
Ondřej Stříteský