In real life I see no problem why my building can't exist in enemy territory. Apart from logistics, about which this game does not care at all, I see no reason why my building should collapse on its own or refuse to be built once the stone, mortar and workers are in place. May be the game needs a more deep redesign in the whole territory concept - may be the territory needs to give an advantage or disadvantage, rather than an absolute limitation. For example, buildings will have +20% hit points and will cost 10% less, will build 50% faster when in home territory, and will correspondingly they will have -20% hit points and will cost 20% more, will build 50% slower when on enemy territory, but will retain their current parameters when on no-man's land. Should I submit my suggestion in another thread?