Farnsburg castle ruins are the remains from the 14th century. It was built by the Counts of Thierstein between 1319-1342. In the 15th century Farnsburg lost its military purpose. The buildings were left to decay and it was easily conquered in 1653 (the Peasants' War) and finally in 1798 (by the revolting farmers). In 1798 the city Vogt was finally expelled and the castle was set on fire by landowners. The ruin was then used as a quarry.
A good starting point for a hike to the ruins is the Landgasthof Farnsburg - from here it is 20 minutes walk to the ruins. There are also BBQ and picnic facilities in close proximity to the ancient ruins.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.