I have visited such museum in Bucharest! :) I don't remember the name but my colleague took me there when I was in Bucharest on a business trip. Those buildings were beautiful. If I remember correctly they had very special shape of roofs.
The museum in Bucharest is close to Herastrau Park. The name is: Village Museum! There is also the Romanian Peasant Museum, more with the objects used by peasants, I think it's the most beautiful museum.