Tržan Castle in Modruš

Tržan Castle is a medieval fortress whose stone walls and bastions stand on a ridge at about 670 meters elevation, overlooking ancient trade routes between the Adriatic coast and Pannonia. The ruins stretch across the hilltop and show the extent of what was once a major stronghold in the region.

The fortress was built and controlled by the noble Frankopan family from 1193 as their main stronghold, and it managed regional trade and administration for centuries. When the town of Modruš was destroyed in 1493, the castle survived repeated attacks and continued to hold importance.

The stone walls display a distinctive fishbone pattern in their construction, showing how medieval builders from the region and Venice shared knowledge about defensive structures. This building technique reflects the trade and cultural connections that linked different parts of Europe at that time.

The site requires sturdy footwear and good physical preparation because the access path climbs uphill and the terrain is uneven. Visitors should allow plenty of time and prepare for changing weather conditions, as the ruins sit exposed on an open hillside.

Even though the region suffered many attacks during the 15th century and the town of Modruš was completely destroyed, the castle remained out of reach of its attackers. This resistance came from its hilltop location and its sturdy construction.

Location: Josipdol

Inception: 9 century

Elevation above the sea: 670 m

GPS coordinates: 45.14866,15.24666

Latest update: December 8, 2025 21:05