Kokemäki (; ) is a town and municipality in the Satakunta Region of Finland. The town has a population of () and covers an area of of which is water. The population density is . Finland is constitutionally bi-lingual with a Swedish speaking minority. The municipality is unilingual with the vast majority of the population speaking Finnish. Many, mostly younger, residents are able to understand or speak some English. The American battery company Æsir Technologies Inc. has announced that it will establish a nickel hydroxide plant producing material for nickel-zinc batteries in the village of Peipohja of Kokemäki. The Kokemäki coat of arms depicts the bishop's mitre. Geography The long Kokemäki River (Kokemäenjoki) flows from Lake Liekovesi, in the Pirkanmaa region, through Kokemäki and in to the Gulf of Bothnia at Pori. The Kolsi hydro-electric power plant is located at Kokemäki. Kokemäki River has long been an important waterway, well known for its salmon, whitefish and lamprey. History It is believed that the Iron Age town of Teljä was located next to the Kokemäenjoki river at Kokemäki. The oldest stone carving yet found in Finland, dated at 8,000 to 9,000 years old, was discovered in nearby Huittinen in 1903. The 10 cm elk's head is in a permanent exhibition at the National Museum of Finland in the capital, Helsinki. Archeological finds from in and around Kokemäki have been dated to the Middle Ages. Kokemäki is thought to have been founded in the 12th century, maybe even earlier. The Kokemäki parish was established in 1324. While part of the Kingdom of Sweden, the administrative area (slottslän) of Kumogård (Kokemäenkartano) was created in 1331. Kokemäki served as the administrative centre of the historical province of Satakunta until 1634. The Medieval Kokemäki Castle was demolished in 1367. The medieval trading route of Huovintie goes from Turku, by Kokemäki and the river of Kokemäenjoki. Along the Huovintie were guild houses where travellers could stay overnight. This was located near the Kokemäki church. The legend states that in 1156 Bishop Henry of Uppsala visited Satakunta on a preaching tour as a part of Eric IX of Sweden's first crusade to Finland. St. Henry's Chapel is a neogothic style brick chapel one kilometre east of the town centre of Kokemäki. The chapel was built in 1857 on the site of a medieval wooden granary which was used by Bishop Henry. It is possible that the original