<P> The perceived shortcomings of the mass housing movement led to efforts to create cost - effective housing solutions that were more varied, more integrated with natural surroundings, and above all more customized to families' needs . In 1973, the Parliament of Norway recommended a shift toward small residential houses rather than large apartment buildings . The Norwegian State Housing Bank (Husbanken) provided citizens with the ability to fund construction of their homes, and an entire construction industry formed to build these needs . </P> <P> As a result of the pioneering efforts by Olav Selvaag and others, archaic and otherwise unnecessary restrictions were relaxed, improving opportunities for more Norwegians to build housing to suit their individual needs and preferences . Norwegians often undertake home improvement projects on their own, and many have built most of their own homes . </P> <P> In the late 1920s, Modernism (or the International style) was taken up by Scandinavian architects . In Scandinavia this architectural trend was called Functionalism (or colloquially in Sweden and Norway "funkis"). Modernism found many adherents among young architects, especially in Norway . Its definite breakthrough was the Stockholm Exhibition in 1930, after which the majority of architects all over Scandinavia converted to the modern movement . Nowhere else did Modernism become so firmly established as the mainstream trend in architecture . It maintained its dominant position until about 1940 . </P> <P> A number of landmark structures, particularly in Oslo, were built in the functionalist style, the first one being the Skansen restaurant (1925--1927) by Lars Backer, demolished in 1970 . Backer also designed the restaurant at Ekeberg, opened in 1929 . The art gallery Kunstnernes Hus by Gudolf Blakstad and Herman Munthe - Kaas (1930) still shows influence from the preceding classicist trend of the 1920s . Hvalstrand bath (1934) is one of several public seaside bath facilities in Norway, by André Peters . A year before, Ingierstrand Bad was designed by Ole Lind Schistad (1891 - 1979) and Eivind Moestue (1893 - 1977). Other great names of Norwegian functionalist architecture are Ove Bang, Fridtjof Reppen, Nicolai Beer (1885 - 1950) and Per Grieg (1897 - 1962). </P>

When was the oslo trading building in norway built