Two hillforts are located in the vicinity of the Molavėnai village. Two nature monuments are protected by the state – an old oak tree near one of the hillfots and a stone called Mokas. Molavėnų I hillfort was first erected in the 1st century AD and consisted of defensive fortifications and a wooden fort. The site is located on a long (350 m), narrow projection into a bend of the river Šešuvis. The site is protected on the northeast and southwest by steep slopes, marshy banks, and the river. To protect it on the northwest, the only known Lithuanian double defensive system that uses earth and wooden outworks was erected on the projection’s neck. In all, it consisted of five ditches, four earthworks, and three levelled courtyards. A fortified settlement was built at the southeast end. In addition, the levelled hilltop areas were surrounded by palisades of sharpened poles. Artefacts dating from the early 1st century to the early second millennium were found during 21st century excavations. The site was eventually abandoned due to continued erosion and the shrinking hilltop.
Molavėnų II hillfort was built 400 m upstream in the 12th century on another projection at the confluence of the river Šešuvis and its tributary, the Jaujupis. Only the northeast and east sides were not protected by natural defences and so were instead guarded by a series of four earthworks and four ditches. A 20 m long earthwork with a corresponding ditch was constructed on the southwest slope. The flat hilltop was ringed by a wooden defensive wall. A tower was erected on the big earthwork, and wooden palisades on the other earthworks. A 2009 excavation discovered pottery dating to the 12th–14th centuries. Dry stone revetting was also found in one ditch.
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.