The Freedom Square ("Vabaduse väljak") is the main square of Tallinn and also the site of the War of Independence Victory Column. The square has had several names during history. The five-meter monument to Peter the Great was erected there by the Russian empire in 1910 and the square was named after him. After the Estonian independence in 1922 the statue was melted and recycled and the square named as the Freedom Square.
About 20 years later, in 1944, the Soviet Union occupied Estonia and in a few years after the area was named as Victory Square. After the Estonia's new independence, the name was restored once again to Freedom Square.
The square is bounded on the east by St. John's Church (built 1862-67), on the south by Kaarli Boulevard and an underground shopping center (2008–09), and on the west by aVictory Column (2009) commemorating the Estonian War of Independence 1918–1920.
The Square has quickly become a meeting place due to its location right next to the Old Town and Toompea (the Cathedral Hill). The majority of the underground pedestrian zone is under the AHHAA Science Centre, Youth Information Point, an exhibition of the history of the Square and archaeological finds.
Ängsö Castle was first named as "Engsev" in a royal charter by king Canute I of Sweden (r. 1167-1196), in which he stated that he had inherited the property after his father Eric IX of Sweden. Until 1272, it was owned by the Riseberga Abbey, and then taken over by Gregers Birgersson.
From 1475 until 1710, it was owned by the Sparre family. The current castle was built as a fortress by riksråd Bengt Fadersson Sparre in the 1480s. In 1522, Ängsö Castle was taken after a siege by king Gustav Vasa, since its owner, Fadersson's son Knut Bengtsson, sided with Christian II of Denmark. However, in 1538 it was given by the king to Bengtsson's daughter Hillevi Knutsdotter, who was married to Arvid Trolle.
In 1710, the castle was taken over by Carl Piper and Christina Piper. Ängsö Castle was owned by the Piper family from 1710 until 1971, and is now owned by the Westmanna foundation. The castle building itself was made into a museum in 1959 and was made a listed building in 1965. It is currently opened to visitors during the summers.
The castle is a cubical building in four stores made by stone and bricks. The lower parts is preserved from the middle ages. It was redecorated and expanded in the 1630s. The 4th storey as well as the roof is from the expansion of Carl Hårleman from 1740-41. It gained its current appearance in the 1740s.