included the University of Helsinki, the Helsinki University of Technology, the Federation of Finnish Learned Societies, and the Confederation of Industries. In 1984, the City of Vantaa offered to be the host city and partial financier for the Science Centre, and also designated a property lot located in the southern end of Tikkurila as the future site of the centre. The total cost of the building was 80 million Finnish markka, or about 13.5 million euro. An architectural competition, held in 1985, turned out two first prizes from which the winning design was selected; namely the "Heureka" design submitted by Mikko Heikkinen, Markku Komonen and Lauri Anttila. That's how the Finnish Science Centre Heureka got its apt name! Before the building was completed, a number of test exhibitions were set up at other sites: Fysiikka -82 at the House of Estates, the medical exhibition Pulssi at the Tali tennis centre in spring 1985, Vipunen about the Finnish people and language at the House of Estates in autumn 1985, the aquatic exhibition AQUA 86 at Messukeskus Helsinki in spring 1986 and the technical and scientific exhibition Teknorama at Messukeskus Helsinki in spring 1987. The interior plan for the Science Centre was completed in 1986. The foundation for the building was laid in October 1987, and the construction work was completed one year later. The overall area of the building is 8,200 m², of which 2,800 m² is exhibition space. The Finnish Science Centre Heureka opened its doors to the public on 28 April 1989. Exhibitions and planetarium Interior of the building The cylindrical main exhibition hall was inspired by an exhibition designed by Gunnar Asplund at the Stockholm city library and houses about 200 exhibits related to different fields of science. Stable exhibits in the area include a Foucault pendulum and a wire wheel at the ceiling. The content of the main exhibition is renewed every couple of years. The main exhibition was renewed completely in 1999, but there are small changes taking place in the main exhibition hall each year as well. The cylindrical main exhibition hall houses many exhibits related to various fields of science. The topics include, for example, digestion and the functions of the intestines, the production of money and traffic. The exhibition "The Wind in the Bowels" has been designed in co-operation with the Finnish Medical Society Duodecim. The exhibition "About a Coin" was implemented through