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
History of Transylvania the last political triumph of Hungarian Protestantism, in which the emperor was forced to reconfirm the articles of the Peace of Vienna. Gabriel Bethlen and George I Rákóczi aided education and culture, and their reign has been called the golden era of Transylvania. They lavished money on their capital Alba Iulia ("Gyulafehérvár" or "Weißenburg"), which became the main bulwark of Protestantism in Central Europe. During their reign, Transylvania was one of the few European countries where Roman Catholics, Calvinists, Lutherans and Unitarians lived in mutual tolerance—all officially accepted religions ("religiones recaepte"). The Orthodox, however, still had inferior status. This golden