The University of Tartu was established by King Gustavus Adolphus of Sweden in 1632, thus being one of the oldest universities in Northern Europe. Over the centuries it has been closed down, moved to Tallinn and re-opened by Baltic Germans. After Estonia became independent in 1918, the University of Tartu has been an Estonian-language institution since 1919.
The main building of Tartu University is one of the most outstanding examples of classical architecture in Estonia. The main building was built in 1804-1809 according to university architect Johann Wilhelm Krause’s plans. The opening ceremony of the university’s main building took place on 3 July 1809. Since that day, all major university events are celebrated in the Main Hall. Because of superb acoustics many concerts are held here, and its spaciousness allows for conferences to be held. The hall was re-opened on 3 May 2002 following its last renovation
The university’s four museums, its Botanical Gardens, and sports facilities are, by and large, open to the general public. The University possesses some 150 buildings, 30 of which are outside of Tartu. 31 of its buildings decorate the city as architectural monuments. However, the current reforms include attempts to sell, or have the state co-sponsor, several of these buildings and monuments, as well as sports facilities, as they are not seen as part of the university's mission proper. At the same time, there are numerous recently constructed/renovated university buildings and student dormitories, such as the Technology Institute and the Biomedical Center.
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.