Oliver G. Traphagen

Oliver Green Traphagen (3 September 1854 – 21 October 1932) was an American architect who designed many notable buildings in Duluth, Minnesota, during the late 19th century and in the Territory of Hawaii during the early 20th century. Among his most famous landmarks are the Oliver G. Traphagen House in Duluth, called the Redstone, and the Moana Hotel in Honolulu, both of which are on the National Register of Historic Places, as are several other buildings he designed.

He was born on 3 September 1854 in Tarrytown, New York.

In the 1870s Traphagen moved to St. Paul, Minnesota, with his parents where he worked as a carpenter, and later as apprentice to the architect George Wirth. He moved north to Duluth in 1882, and soon became one of the city's first major architects. The 1880s were boom times in Duluth; the population was 30,000 in 1887 compared with 13,000 in 1883. Over the next fifteen years, either on his own or in partnership with Wirth (1884–1886) and later Francis W. Fitzpatrick (1889–1896), Traphagen designed buildings for both public and private owners, such as the First National Bank (1888), Turner Hall (1888), Wieland Block (1889), old City Hall and Jail (1889),Fire Station No. 1 (1889), First Presbyterian Church (1891), and Duluth Central High School (1892). Many of Traphagen's designs show the influence of the Richardsonian Romanesque style that was popular at the time.

Because his daughter's health required a warmer climate, the family relocated to the soon-to-be-annexed Republic of Hawaii in October 1897. Thanks to his earlier work in Duluth he soon became "the most prolific and highly regarded architect in town." He designed the first building in the islands with a passenger elevator, the Judd Building (1898); the first hotel on Waikiki Beach, the Moana (1901); and the first public crematory in the Islands, at Oahu Cemetery (1906). As in Duluth, he also designed public works, such as the Kakaako Pumping Station (1900),Palama Fire Station (1901), and the State Archives Building (1906).

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