I also finished the orthodox church cupola and onion domes. The sacristy got its curved roof using two half round diagnosed supports, wrapped in cereal board. I then cut the cardboard into strips and glued down in overlapping sections to form the hemisphere at the end. Tough to do but I'm happy with the result. The domes are simply wooden Christmas ornaments glued upside down. I then cut the tips level and glued on some laser cut crosses.
I also wanted some other bases besides houses so I made a walled enclosure and a pig pen. Below are pictures I used for inspiration for the pig shelters. Most appear from the Baltic states, so I don't know if they were the same in central Russia...but they look cool!