Tuusula (; ) is a municipality of Finland. It belongs to the Helsinki sub-region of the Uusimaa region. The municipality has a population of () and is by far the third largest municipality in Finland after Nurmijärvi and Kirkkonummi that doesn't use the town or city title by itself. Geography Tuusula, lying on the shores of Tuusulanjärvi lake, is located in the province of Southern Finland and is part of the Uusimaa region. It covers an area of of which is water. The population density is . Tuusula has three population centres. The administrative centre is Hyrylä (about 19,500 residents), other two are Jokela (5,300 residents) and Kellokoski (4,300 residents). The remaining 4,400 residents are distributed to the rural areas outside of municipal centres. The most significant main road connection between Hyrylä and Helsinki is the Tuusulanväylä motorway. The neighbouring communes are Vantaa to the south, Nurmijärvi to the west, Hyvinkää to the north, Mäntsälä and Järvenpää to the north east, and Sipoo and Kerava to the east. Villages Huikko, Hyrylä, Jokela, Jäniksenlinna, Kellokoski, Lahela, Myllykylä, Nahkela, Paijala, Riihikallio, Ruotsinkylä, Ruskela, Rusutjärvi, Savikulma, Siippoo, Vanhakylä History The area in what is now Tuusula was located in the larger municipality of Sipoo. In 1643, it became a separate parish in the municipality, and in 1653, it became a separate municipality. Tuusula's boundaries have not always remained the same: in 1924 the municipality of Kerava split from here; in 1950 the municipality of Korso was split between Tuusula, Kerava, and Sipoo; and in 1951 the municipality of Järvenpää split from here. During the Crimean War (1853–1856), a Russian garrison was stationed in what is now Hyrylä. The modern parish mostly developed around it. The area had always been a fairly fertile area, thus encouraging farming. The development of other industries began in 1795, when an ironworks was created in Kellokoski that functioned until the 1980s. The establishment of a railway in Jokela furthered the growth. Soon after this industrial time another aspect of Tuusulan history was realised. The Tuusulanjärvi lake attracted many artists who wanted to paint the beautiful landscape. Following the footsteps of Aleksis Kivi, the Finnish national poet who spent the last years of his life in a hut on the shores of the lake, Jean Sibelius, Juhani Aho, and Pekka Halonen even established their main residences here. Recently these houses have become tourist sites, especially Sibelius' house Ainola. Also,