It is composed of eight villages: Bologa (Sebesvár), Cerbești (Kecskéstanya), Hodișu (Hodosfalva), Lunca Vișagului (Viságmező), Morlaca (Marótlaka), Poieni, Tranișu (Tarányos), and Valea Drăganului (Nagysebes).

It was built around 106 AD, as a garrison for the “II Cohortis Hispanorum” (see Dux), whose mission was probably to defend the Roman Empire's border.

The ruins of the castrum are still visible today in the place still called "Grădiște" which means "fortified settlement", although most of the area is cultivated.

Overlooking the castrum, on the opposite bank of the Henț (Sebeș) river, on top of a steep hill lies one of the first Hungarian fortresses in Transylvania, which was mentioned for five centuries as Sebesvár, featuring on most Middle-Age maps of the region.

The Hungarian king, Sigismund of Luxembourg after signing in Brașov an alliance treaty against the Turks in 1399 gave the fortresses of Bran and Bologa to Wallachia's prince Mircea cel Bătrân.

Built to watch the strategic road that went from Oradea inside Transylvania, the fortress also served as a refuge for the local population throughout the centuries.

The Second Vienna Award in August 1940 temporarily re-situated Bologa and all of Northern Transylvania in Hungary, right at the border (some territory on the hills nearby remained in Romania).