Indestructible Forest Clearing is hardcoded. You can't make other buildings indestructible. Sometimes you really need to destroy something. For example, church of the other faith that stays after you conquered the province. It happens sometimes. The church still spreads other faith and occupies the slot so you can't build your own.

Quote Originally Posted by western View Post
I'm getting to grips with 1.1 but I think a VI version will bring a few more players. Playing an old game like MTW is pretty arcane, but playing an early version of an old game is niche to the extreme. Redux deserves a wider audience
You're right. I think most of the people (like me) nowadays have gold, eras or other editions which have VI built-in.