Mustion Linna, also known as Svartå Manor or Mustio Castle, stands as one of Finland's most valuable mansions, built between 1783 and 1792 by Magnus Linder II. This impressive wooden structure ranks as the largest ecclesiastical timber building in Finland, set within one of the country's largest private historical parks featuring winding paths, romantic bridges, and distinctive water lily pathways. The castle is embedded in the historic Svartå ironworks village, whose charming red and yellow buildings preserve the heritage of an iron foundry dating to the late 16th century. The manor operates today as both a museum and hotel, hosting summer theatre productions and various cultural events, and notably contains the 'King's Room' where royalty and notable figures including King Gustav III and composer Jean Sibelius have stayed. The extensive gardens and castle grounds provide a retreat embodying early 19th-century romantic ideals.
