Libštejn castle is located above the Berounka south of Liblín in the Rokycany district. The castle was built by the royal construction manager Ulrich Tista von Liebstein as a private residence and was first mentioned in writing in 1361. At the end of the 14th century the castle came into the possession of the lords of Kolowrat. In the Hussite Wars belonged Libštejn Bedřich von Kolowrat, who, together with his brother Hanuš, was an important opponent of the Hussites.
In 1425 the castle was besieged by the Hussites and shot at from the surrounding hills. After seven weeks of siege, the two brothers signed an agreement with the Hussites and switched to their side. In 1590 the castle was mentioned as desolate. The main building of the castle were two adjoining palas buildings, which formed a small elongated courtyard in the middle. On the short sides, the courtyard was accessed by a square residential tower. The hilltop castle was built between three other higher peaks. This militarily unfavorable choice of location is due to the calm and stable times of Charles IV.
References: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.