The fortress was a primary seat of the powerful nobleman Stjepan Vukčić Kosača, the Grand Duke of Bosnia.
Its strategic position allowed for visual surveillance over the key trade routes connecting the Adriatic coast with the Bosnian interior.
The masonry techniques reflect a transition from late medieval construction to later Ottoman defensive reinforcements.
It is one of the few surviving fortified structures in the region that retained its defensive function across two distinct imperial eras.
The structure includes an ancient water collection system, essential for sustaining the garrison during prolonged sieges.
The Fortress of Herzog Stjepan Vukčić Kosača, also known as Old Town Ljubuški or Herceg Stjepan Tower, sits atop Buturovica hill overlooking the Trebižat River valley. Constructed in the 14th and 15th centuries, the fortress served as a strategic military outpost for the Bosnian medieval nobility. The complex consists of a central tower, fortified ramparts, and a cistern, showing significant influence from defensive architecture of the period. Recent archaeological excavations have revealed layers of occupation spanning from the medieval era through the Ottoman period. Its elevated position provides panoramic views of the karst landscape of Western Herzegovina. The site remains partially ruined but features restored masonry sections that delineate the original ground plan.
The highest point of the central tower walls, facing west towards the sunset and the valley floor.
Wear sturdy hiking boots as the approach involves uneven, rocky, and steep terrain.
Carry plenty of water, as there are no vendor facilities once you reach the summit.
Bring binoculars to identify distant landmarks in the Trebižat River valley.
Do not attempt the ascent during thunderstorms, as the exposed peak is prone to lightning strikes.
Open year-round, but site access may be restricted during severe winter weather or high wind conditions.
Avoid climbing on loose masonry walls for safety and preservation reasons.
