About this 3D model
The metropolis peice from Settlers of Catan, Cities and Knights. It is desgined to fit with the set found herehttps://www.myminifactory.com/object/3d-print-cities-knights-2-0-magnetic-multicolor-65328 both the city wall and city should fit, only issue you might have is the roads get pushed out just a little but if you dont use the road filler circle pieces it should not be a problem.