Our east-side neighbors, East Ungaria
Bekescsaba (Bichişciaba in romanian), Debrecen (Debreţin) & Szeged (Seghedin). Those three are one of the most important cities in the Panonian Plain (as named by the Roman Empire to administrate their whole province). That vaste territory was in the Terciary Age (Cenozoic) the Panonian Sea. Now is a sedimentary basin where the main rivers are the Danube and the Tisza.
The Danube (Wien, Bratislava, Budapest, Belgrad among others) divide Hungary in two parts, thus the east part is the real Panonia, to considerate as weel the north part of Serbia and, of course, the West part of Romania, Crisana and Banat plains. The Tisza river pass through Szeged, before joining the massive Danube river in Serbia.
In the west part of Romania you can see the same architecture as in Hungary, as the result of the Austrian-Hungarian Empire. Did you realised? Oradea (Nagyvarad), Timisoara (Temesvar) & in Arad (Arad).
To finish, let me told you Oradea is in city-brothership with Debrecen. Cause the past there are too much similarities!!