Transylvania (Transilvania or Ardeal; Erdély; Siebenbürgen or Transsilvanien, historically Überwald, also Siweberjen in the Transylvanian Saxon dialect) is a historical and cultural region in Central and Eastern Europe, encompassing central Romania. To the east and south its natural border is the Carpathian Mountains and to the west the Apuseni Mountains. Broader definitions of Transylvania also include the western and northwestern Romanian regions of Crișana and Maramureș, and occasionally Banat. Historical Transylvania also includes small parts of neighbouring Western Moldavia and even a small part of south-western neighbouring Bukovina to its north east (represented by Suceava County). The capital of the region is Cluj-Napoca.
Transylvania is known for the scenery of its Carpathian landscape and its rich history, coupled with its multi-cultural character. It also contains Romania's second-largest city, Cluj-Napoca, and other very well preserved medieval iconic cities and towns such as Brașov, Sibiu, Târgu Mureș, Alba Iulia, Mediaș, and Sighișoara. It is also the home of some of Romania's UNESCO World Heritage Sites such as the Villages with fortified churches, the Historic Centre of Sighișoara, the Dacian Fortresses of the Orăștie Mountains and the Roșia Montană Mining Cultural Landscape.
It was under the rule of the Agathyrsi, part of the Dacian Kingdom (168 BC–106 AD), Roman Dacia (106–271), the Goths, the Hunnic Empire (4th–5th centuries), the Kingdom of the Gepids (5th–6th centuries), the Avar Khaganate (6th–9th centuries), the Slavs, and the 9th century First Bulgarian Empire. During the late 9th century, Transylvania was reached and conquered by the Hungarian tribes, and Gyula's family from the seven chieftains of the Hungarians ruled it in the 10th century. King Stephen I of Hungary asserted his claim to rule all lands dominated by Hungarian lords. He personally led his army against his maternal uncle Gyula III and Transylvania became part of the Kingdom of Hungary in 1002.