He was a leading representative of dragon style architecture (Dragestil) which originated in Norway and was widely used principally between 1880 and 1910.
In the early 1870s, he was an apprentice in Christiania (now Oslo) and a student at the drawing school of Wilhelm von Hanno.
From 1889 he worked for the Holmenkol-Voxenkol, a joint-stock company with major investors including resort operator Dr. Ingebrigt Christian Holm (1844-1918), brewery owner Ellef Ringnes (1842-1929) and wholesaler Alfred Larsen (1863-1950).
Munthe designed a number of structures in dragestil architectural style as part of this development including the well-known Frognerseteren Restaurant from 1890 and the Holmenkollen Turisthotell, which was built in 1889, but burned in 1895.
[4][5] Emperor Wilhelm II of Germany, vacationing in Norway, noticed these buildings and commissioned the erection of his Rominten Hunting Lodge in East Prussia; however these buildings were largely destroyed after World War II, remnants of the Lodge are used as the seat of the administration at the Kaliningrad Central Park.