The Alatskivi Manor (Allatskiwwi in German) was first mentioned in 1601. In 1628 Swedish king Gustav Adolf II donated it as a gift to his secretary Johan Adler Salviusele. In 1642 the manor was further passed into the possession of Hans Dettermann Cronmann and in 1753 it was bought by Otto Heinrich von Stackelberg.
The present huge castle manor was designed by the land owner Arved von Nolcken. He had travelled in Scotland and fascinated to the Balmoral Castle. Von Nolcken wanted to build a copy of royal castle to Alatskivi. The new neo-Gothic main building was completed in 1885 and it was one of the most luxurious manor houses in Estonia.
At present, the building is owned by Alatskivi Community and being restored to serve as a museum and restaurant.
Reference: Visit Tartu
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.