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Ostrozac Castle

A medieval fortress above the Una enlarged into a Gothic-revival castle in the 1900s, with a sculpture park.

Updated 21 October 2026

Typecastle
WhereUna-Sana
Nearest cityCazin
Best seasonMay to September
Time to allowOne to two hours
Getting thereAt Ostrozac, between Cazin and Bihac above the Una valley
EntryCharged

Ostrozac began as a medieval fortress above the Una, held by the Babonić family and from 1592 by Ottoman garrisons, and it acquired its present appearance in the early twentieth century when the Habsburg-era owner, Lothar von Berks, built a neo-Gothic residence within and against the old walls, so the site combines a genuine medieval and Ottoman fortress with a romantic revival castle grafted onto it. Since 1970 a sculpture colony has been held here, and stone works from successive years stand through the courtyards and grounds, which is the other reason to come. The position above the Una valley gives long views. Parts of the complex remain unrestored.

Highlights

  • The medieval walls - the fortress fabric beneath the later work.
  • The neo-Gothic residence - the twentieth-century castle within the walls.
  • The sculpture park - the stone works from the annual colony.
  • The Una valley view - the outlook from the walls.

When to go

May to September for the grounds and the views; opening is seasonal with reduced winter hours. The sculpture colony works in summer. Mornings are quiet.

Things to know

Parts of the complex are unrestored and closed. Opening hours are seasonal and can be irregular. Interpretation is limited. The visit takes about an hour.

Nearby

Bihac and the Una national park lie south; Cazin is north.

Key facts

Local nameOstrožac (Bosnian)
Built16th century
Stylemedieval architecture, Ottoman architecture
Heritage statusNational Monuments of Bosnia and Herzegovina
Location44.9040° N, 15.9370° E · map

Source: Wikidata, item Q2968336, read on 18 October 2026.

What to pack for Ostrozac Castle

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Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.

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