Zrinski Fortress

Brod na Kupi is a small settlement on the upper Kupa river in Gorski Kotar, the forested mountain region of western Croatia, right on the border with Slovenia, where the river forms the frontier. The area has been a crossing point for centuries, and the fortress that stands here is connected with the history of two of the greatest noble families of Croatia, the Frankopans and the Zrinskis. Both families ruled large territories in the country and left castles and manors across it, and Brod na Kupi is one of the places where their story can be followed.

A castle of the Frankopans is thought to have stood on the site in the late Middle Ages, controlling the river crossing and the road, and in the seventeenth century, the Zrinski family, who had acquired the Frankopan lands through marriage and inheritance, rebuilt the fortress. It is usually associated with Petar Zrinski, the Croatian ban who was executed in 1671 after a failed conspiracy against the Habsburg court, together with his brother-in-law Fran Krsto Frankopan, an event that ended the power of both families and became one of the best-known tragedies in Croatian history. The fortress is therefore a place that evokes the last chapter of these two houses.

Architecturally, the building is a simple, solid structure of several storeys, with thick masonry walls and a hipped roof, rising from a stone base. Remains of outer fortifications, such as walls and a moat line, can be traced around it, and the setting beside the river, surrounded by forested hills, gives it a strong sense of place. It does not look like a fairy-tale castle, and its plain, functional design reflects the practical needs of a border fortress.

Today the fortress is used as a cultural and visitor centre. It houses an exhibition on the natural and cultural heritage of the region, under a title that plays on the contrast between the wild forests of Gorski Kotar and the sea that lies just beyond the mountains, and it acts as an information point for the Frankopan routes, a network of heritage sites that tell the story of the Frankopan and Zrinski families across northern Croatia. A museum of forestry, hunting and fishing, listed in this guide, explains the traditional industries of the area, which depended on timber, game and the river.

The surrounding scenery is part of the visit. The upper Kupa is a clear, cold river that offers fishing, canoeing in suitable places and quiet walks along its banks. Opening hours and ticket arrangements for the fortress are limited and change with the season, so check locally or with the tourist board. The visit suits history enthusiasts, nature lovers and travellers exploring Gorski Kotar. Allow an hour for the fortress, and more for the river and museum.