exports in the 1860s and 1870s. In 1889 Finland's first oil harbour was built in the area, but it was later moved to Herttoniemi because of fire security reasons in 1938. The harbour switched from export to import in the late 19th century, when the forestry export started to travel via Kotka and Vyborg. Other industry Sörnäinen has been a central area in electricity production. The Suvilahti power plant was taken into use in 1909. The A plant of the Hanasaari Power Plant was built in 1960 and the B plant was built in 1974. The A plant was dismantled in 2008, but the B plant is still in operation. Early industrial facilities of the area include the Kokos factory built in 1911, which represented the same architectural age and style as the Suvilahti power plant. The factory made soap and margarine from coconut fat. In 1926 the premises were bought by Kone, which used them to make elevators. Kone moved away from the premises in 1967. The logistically outdated premises were left empty and were bought by the working class oriented building company Haka to be dismantled, but the youth of the city squatted the premises in 1990. After the squat the Kokos factory was closed down, and the Helsinki Theatre Academy has worked at the premises since 2000. The economic activity of the working class was concentrated on Sörnäinen for a long time: premises located in the area included OTK-EKA's and Elanto's red brick headquarters designed by Väinö Vähäkallio in the 1920s as well as storehouses, logistics, Elanto's main bakery, the main mill of OTK, a coffee roaster and other activities. The premises have since been converted into apartments, offices and academic premises. After the industry moved away, the Partek headquarters were built on Sörnäisten rantatie, whose exhibition space has been converted to the library of the working class movement. Urban construction spread from Sörnäinen to Kallio, when a group of industrialists founded a joint-stock company to house their workers, which caused a row of "corporate villas" to be built. Large numbers of workers lived in the villas. Many of the apartments lacked a toilet and entire families of four people could live in a single small room. These proletariat conditions gave rise to the Helsinki slang in the early 20th century. Near the Sörnäinen harbour, along both sides of Sörnäisten rantatie, there have been many factories, for