Bosnian Castles

Cazin · Krajina · Medieval · Ottoman

Tržac Fortress

Tržac stands above the Mutnica–Korana confluence and gave its name to a Frankopan branch.

Location
Cazin · Krajina
Local name
Stari grad Tržac
Historical period
Medieval · Ottoman

Tržac overlooks the meeting of the Mutnica and Korana. The heritage institute traces its ownership to the Babonići and then the Frankopans from 1323. Later Ottoman guards served under the Bihać captaincy. The remains are spread around a natural rise, with interrupted walls and open towers rather than a central keep.

Explore the 3D model

History and context

A noble seat above the rivers

The regional heritage institute links Tržac to the Drežnik district, held by the Babonići before the Frankopans took over in 1323. The river junction helps explain the castle’s place within this borderland.

Later military service

A permanent Ottoman force was installed in 1626 under the deputy of the Bihać captain. Eighteenth-century records describe a larger force and six cannons. Military occupation continued even as the walls deteriorated; an active garrison did not necessarily mean an intact fortress.

The Frankopan connection

One branch of the Frankopan family took its name from Tržac, according to the regional heritage institute. The castle was therefore more than a convenient hilltop: it also identified a noble lineage. Its location above the meeting of the Mutnica and Korana provides a clear geographical reference when distinguishing Tržac from nearby Mutnik, which stands farther along the Mutnica. These are connected places in the same river landscape, but separate fortresses. Keeping that distinction in mind helps avoid transferring an event or owner from one site to the other.

Through the centuries

Medieval period

Early defensive phase represented by surviving or documented masonry.

Ottoman period

Frontier garrisons and subsequent alterations reshape the site.

Architecture & evidence

Northeastern polygonal tower

The defensive projections are open toward the court. Uneven shells indicate loss rather than complete roofed towers.

Lower northern defenses

The natural summit rises above the surrounding curtain. An interior terrain mound expresses this unusual relationship.

Unwalled southwestern slope

The steep southwestern side is left without an invented wall. Mapped river channels explain the setting below.

Plan your visit

The directions link marks the historic site, not a parking area. Confirm the final approach and current access locally.

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Historical sources

How to read this history

A first written mention is not necessarily a construction date. Fortresses were often altered over several centuries. Sections link to their supporting references; the 3D model is an interpretation, not evidence of every historical phase.

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