Kernavė was a medieval capital of the Grand Duchy of Lithuania and today is a tourist attraction and an archeological site. In 2004 Kernavė Archaeological Site was included into UNESCO world heritage list. The area of Kernavė was sparingly inhabited at the end of the Paleolithic era, with the number of settlements significantly increasing in the Mesolithic and Neolithic eras. It is believed, that first inhabitants settled in Kernavė territory in 9-8 millennium BC, but only in the first centuries AD they started to form bigger settlements in the Pajauta valley (Kernavė territory). Settlements were protected by five fortified mounds, which still remain.
The town was first mentioned in 1279, when, as the capital of the Grand Duke Traidenis, it was besieged by the Teutonic Knights. In 1390, during the Lithuanian Civil War (1389–1392), the knights burned the town and its buildings in the Pajauta valley, including the castle. After this raid, the town wasn't rebuilt, and the remaining residents moved to the top of the hill instead of staying in the valley.
In later years, the remains of city were covered with an alluvial earth layer, that formed wet peat. It preserved most of the relics intact, and it is a treasure trove for archaeologists, leading some to call Kernavė the 'Troy of Lithuania'. For example, Kernavė has the oldest known medgrinda, a secret underwater road paved with wood. The road was used for defense and dates from the 4–7th centuries.
The site became the subject of wider interest again in the middle of 19th century, when a romantic writer, Feliks Bernatowicz, depicted the area in his novel Pojata, córka Lizdejki in 1826. The hillforts were soon excavated by the Tyszkiewicz brothers and then by Władysław Syrokomla (1859). After World War II, the excavation works were restarted by Vilnius University in 1979, and then again by the Lithuanian Institute of History between 1980–1983.
References:The Broch of Gurness is an Iron Age broch village. Settlement here began sometime between 500 and 200 BC. At the centre of the settlement is a stone tower or broch, which once probably reached a height of around 10 metres. Its interior is divided into sections by upright slabs. The tower features two skins of drystone walls, with stone-floored galleries in between. These are accessed by steps. Stone ledges suggest that there was once an upper storey with a timber floor. The roof would have been thatched, surrounded by a wall walk linked by stairs to the ground floor. The broch features two hearths and a subterranean stone cistern with steps leading down into it. It is thought to have some religious significance, relating to an Iron Age cult of the underground.
The remains of the central tower are up to 3.6 metres high, and the stone walls are up to 4.1 metres thick.