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 lake. In 1905 the company ceased operations and the National Museum of Finland was their last work. Its construction was monitored by Lindgren alone.