History of Finland between 150000 BC - 4001 BC
If confirmed, the oldest archeological site in Finland would be the Wolf Cave in Kristinestad, in Ostrobothnia. Excavations are currently underway, and if the so far presented estimates hold true, the site would be the only pre-glacial (Neanderthal) site so far discovered in the Nordic Countries, and it is approximately 125,000 years old.
The last ice age in the area of the modern-day Finland ended c. 9000 BCE. Starting about that time, people migrated to the area of Finland from the Kunda and - possibly - Swiderian cultures, and they are believed to be ancestors of today's Finnish and Sami people in Finland. The oldest confirmed evidence of the post-glacial human settlements in Finland are from the area of Ristola in Lahti and from Orimattila, from c. 8900 BCE. Finland has been continuously inhabited at least since the end of the last ice age, up to date.
The earliest post-glacial inhabitants of the present-day area of Finland were probably mainly seasonal hunter-gatherers. Their artifacts discovered are known to represent the Suomusjärvi and the Kunda cultures. Among finds is the net of Antrea, the oldest fishing net known ever to have been excavated (calibrated carbon dating: c. 8300 BCE).
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.