Transylvania as originally defined in Treaty of Trianon, 27 years earlier, thus confirming the return of Northern Transylvania to Romania. From 1947 to 1989, Transylvania, along with the rest of Romania, was under a communist regime. The ethnic clashes of Târgu Mureș occurred between ethnic Romanians and Hungarians in March 1990 after the fall of the communist regime and became most notable inter-ethnic incident in the post-communist era. The Transylvanian Plateau, high, is drained by the Mureș, Someș, Criș, and Olt rivers, as well as other tributaries of the Danube. This core of historical Transylvania roughly corresponds with nine counties of
Prehistory of Transylvania salt Transylvania is so rich in. Just as the obsidian, most probably exploited in the Bükk Mountains (Hungary), is encountered in the Wietenberg cultic complex discovered at Cluj-Napoca. The amber items in the deposit discovered at the Cioclovina cave came from the Baltic Sea, while the Caucasian influences are indicated by the axe discovered at Larga (Maramureş County). The marked expansion of pan European trade in middle and late Bronze Age created growing dependence between the different cultural groups, and an acceleration of uniformity in cultural values and produce. All of which sped up the general development of society and