The Olofsborg building is part of a larger housing cooperative in the Katajanokka district of Helsinki, Finland. The building was built in 1903 and was designed by the Finnish architecture firm Gesellius, Lindgren, and Saarinen. Olofsborg exemplifies the style of the early 20th century Jugendstil, or Art Nouveau architecture.
Information from: http://www.korttelit.fi/rakennus.php/id/1291
This image was taken in 1996 by John Schooley, FAIA, during an architectural tour of Finland.