| Blagaj Fortress | |
|---|---|
Old Town Blagaj (Stjepan-grad, or Stipan-grad) | |
| Part of Historic site of Blagaj | |
Blagaj, Mostar, Herzegovina-Neretva Canton  Bosnia and Herzegovina | |
 Blagaj fortress, seat of Kosača family | |
 | |
  Blagaj Fortress | |
| Coordinates | 43°15′36″N 17°54′08″E / 43.26000°N 17.90222°E |
| Type | Castle (residential, fortification) |
| Site information | |
| Owner | Kosača noble family |
| Controlled by |
|
| Open to the public | yes |
| Condition | Repaired |
| Site history | |
| Built | 4th c. (then 948) |
| Built by | multilayered (probably of local Illyrian) |
| Materials | Limestone (partly ashlar) |
| Battles/wars | Ottoman siege |
| Designations | |
| Official name | Old Fort of Blagaj (Stjepan grad), the historic site |
| Type | Category I historical monument |
| Criteria | A, B, C iv.vi., D ii., F ii.iii., G i.ii.v., H i. |
| Designated | 6 December 2003 |
| Part of | Blagaj, the historic urban area |
| Reference no. | 1863 |
| Decision no. | 06-6-1029/03-5 |
| Site is part of the Historic site of Blagaj on the Buna, also protected as National Monument of Bosnia and Herzegovina by the KONS BiH | |
Blagaj Fortress or Old Town of Blagaj (Bosnian, Croatian and Serbian: Stari grad Blagaj, Serbian Cyrillic: Стари Град Благај; pronounced [blaːgaj]), locally known as Stjepan-grad (Стјепан-град), or Stipan-grad, in classical times Bona (Бона), is a town-fortress complex near the town of Blagaj, Bosnia and Herzegovina. The old Blagaj Fort was built on a high, inaccessible karst hill, at an elevation of 310 metres (1,020 ft) above sea level and 266 metres (873 ft) above the source of the river Buna. Blagaj Fort is 275 metres (902 ft) above sea level. Fortress is National monument of Bosnia and Herzegovina, declared by KONS on 6 December 2003.