Transilvania was Romanian land for thousands of years, up until the descendants of Attila the Hun, current Hungarians stole it from Romania. Now its back and all their claims are just a pathetic attempt. Same happened with part of the Romanian region called Moldova, the Russians took it and its still under their wings.
Romania was the most robbed country in Europe since the romans conquered part of it around 2000 Years ago as it had everything, from gold mines to rich crops and everybody wanted a piece of it, the romans, the Ottomans, the huns/Hungarians, the Slavs/ Russians, everybody.
And despiting all they stole (the tons of gold the Russians and Germans stole in the 2nd ww2 for example) and all the influences in looks, language the conquerors brought, Romania remains traditional (maybe to preserve its identity) and still has a national treasure (which is currently kept in London
I'm sure anyone interested can Google for more information, I just did a short resume