Slide show of some of the Norwegian folk costumes by the artist Eckersberg published in 1925 as postcards. 

Ethnic Folk Costume Sunnfjord Norway 1925c postcard

The term folk costumes is applied to the particular clothes worn by the rural farm population in pre-industrial Norway, according to the Norwegian Institute of Bunad and Folk Costume.  These clothes were the "result of tradition, external influence, local creativity and individual taste, and differed from the clothing habits in urban areas" where city-dwellers were more influenced by broader European fashions.

By the mid 19th century, the wearing of folk costumes was declining but Norwegian nationalism embraced folk culture of the countryside and folk costumes regained popularity. In modern times, folk costumes have become expressions of national pride and are worn particularly on Constitution Day, May 17, as the images at this site indicate. 

Laplander Ethnic Folk Costume Finnmark Norway 1925 postcard

Lapland is a region largely within the Arctic that spans parts of Finland, Sweden, Norway and Russia. The Sami people, earlier referred to as Lapps or Laplanders, are the historical inhabitants of this area. This postcard captures the traditional dress of Sami living in the Norwegian region of Finnmark. While Norwegians form the majority of the population on the outer islands, the population is mixed in the fjord settlements, with Sami forming the bulk of the population in the interior.  A reversal of Norwegianization policy in the 1980s has seen an official apology from the King of Norway, reparations being made to Sami, the introduction of Sami language in schools, and a revitalization of their culture.