Tiversk or Tiversky gorodok (Finnish: Tiurinlinna) was a medieval Russian fortified settlement situated on an island of the River Vuoksi. The fort was 215–300 m long and 40–56 m wide. It gained in prominence in 1323 when the Treaty of Nöteborg established a Novgorodian-Swedish border in the immediate vicinity. It was then mentioned in the Nikon Chronicle in 1404, when the settlement was granted to Prince Yury of Smolensk as an appanage. Seven years later, the fort was sacked and destroyed by the Swedes during one of the Swedish-Novgorodian Wars.
The site of Tiversk was first identified and described by Jacob Groot in 1847. The remnants were excavated in 1888-1891 by Hjalmar Appelgren, Theodor Schwindt and Alfred Hackman, in 1971 by Anatoly Kirpichnikov, and in 1971-1974 by Svetlana Kochkurkina. Most remnants are dated end of the 13th-beginning of the 15th century. In 1890 archaeological works revealed a treasure trove with 13th-15th century Arabic silver coins. Some remnants dated 10th-early 12th century have also been discovered. The ramparts and stone walls of the settlement were 4.5 to 7 metres thick.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.