They achieved international recognition with their design for the Finnish pavilion at the
Paris World Expo in 1900, designed in the then prevailing
Art Nouveau style. In 1901–1904 the three architects designed and built an extensive studio home for themselves and their families called
Hvitträsk, in the rural community of
Kirkkonummi by the
Vitträsk [
fi] lake.[4] In 1905 the company ceased operations and the
National Museum of Finland was their last work. Its construction was monitored by Lindgren alone.[5]