Of central importance in the development of architecture in Finland for over 100 years has been the development of architectural competitions, mostly under the control of the Finnish Association of Architects (SAFA). The first architectural competition was held in 1860, even before the founding of SAFA. Twelve competitions had been held by 1880. It was only after 1893 that the competition system became more systematic, with the setting of rules. Many of the leading works of architecture at the turn of that century were the results of competitions: e.g. Tampere Cathedral (Lars Sonck, 1900), National Museum, Helsinki (Herman Gesellius, Armas Lindgren and Eliel Saarinen, 1902). Sonck was only 23 years old when he won the competition. Indeed, several well-known architects kick-started their careers while still young by winning an architecture competition. Competitions have been used not only in the design of public buildings and churches, but also for various scales of urban and regional planning. Beside Sonck and Gesellius-Lindgren-Saarinen, among the notable careers that began or were boosted by competition success are: Vyborg Library by Alvar Aalto, the Finnish pavilion at the 1958 Brussels World's Fair by Reima Pietilä, Myyrmäki Church (1984) by Juha Leiviskä, the Nokia Corporation Headquarters, Espoo (1983–97) by Helin and Siitonen Architects, the Heureka Science Centre, Vantaa (1989) by Heikkinen – Komonen Architects, the Lusto Finnish Forest Museum, Punkaharju (1994) by Lahdelma &amp; Mahlamäki Architects, the new canopy for the Helsinki Olympic Stadium (2003) by K2S Architects, and the Kilden Performing Arts Centre (2012), Kristiansand, Norway, by ALA Architects. The competition results have been seen to have reflected the international trends of the time, or to have endorsed the critical regionalism, that is, what Aalto had referred to as "being international yet true to themselves".