Gustaf Adolf Serlachius (1830-1901) and his nephew Gösta Serlachius (1876-1942) were industrialists and one of the paper mill business pioneers in Finland. Gösta Serlachius founded the Gösta Serlachius Art Foundation in 1933, which became soon one of the wealthiest art collectors in Scandinavia. In 1945 foundation opened the art museum in Mänttä where the paper mills founded by Serlachius still exist.
Serlachius Museum Gösta is a museum of fine arts. At Joenniemi Manor you can see the Serlachius collection, one of the most important private art collections in the Nordic countries. It contains classic works of Finnish art and old European paintings from the 15th century to the 1940s. In the courtyard you can find a cosy cabin designed by the architect W. G. Palmqvist. Autere Cabin, Gösta's atmospheric cafeteria and restaurant, is the former home of the Joenniemi Manor bailiff.
Near the Gösta Museum is another museum named after Gustav Serlachius. The basic exhibition of Serlachius museum Gustaf traces the course of life in industrialising Finland from 19th century to the the present day. The exhibition shows how a small village grew into the home town of a major forest industry combine and learn about the everyday lives and festivities of both its gentry and workers.
Reference: museot.fi, visittampere.fi
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.