Frederick G. Clausen  Frederick George "Fritz" (Friedrich Georg) Clausen (1848–1940) was a Danish-born architect who came to the United States in 1869 and founded an architectural practice in Davenport, Iowa. The firm that he founded, presently named Studio 483 Architects, is still in business today, the oldest firm in continuous practice in the state of Iowa. Clausen has been termed the "premier 19th century architect" of Davenport, Iowa. Clausen was born in Eckernförde, Schleswig, Denmark on 13 February 1848 or 1 May 1848. His official name in Eckernförde was: "Fritz Georg Martin Clausen". He emigrated to the U.S. in 1869, but put his emigration request in Germany ("Kreis Eckernförde") until 1871. He was a Fellow of the Western Association of Architects (WAA) from 1885 to 1889. Following the incorporation of WAA into the American Institute of Architects (AIA) in 1889, he became a Member of AIA, continuing that membership until his retirement in 1914. In addition to his architecture practice, Clausen was an alderman of the city of Davenport, and was instrumental in setting up the Davenport paid fire department in 1882, with three new fire appliances. After his arrival in America, Clausen initially worked as a draftsman for Thomas W. McClelland a local architect of some note. He opened his own firm - F.G. Clausen - in Davenport in 1871, working alone until 1896, and then partnered with Parke Burrows until 1904. When Burrows left, Clausen's son Rudolph J. Clausen, joined the company, which then became known as Clausen & Clausen. Clausen retired in 1914, and his son continued in business as Clausen & Kruse with Walter O. "Stub" Kruse; and from 1925 with Carrol Klein as the head of interior design, forming Clausen, Kruse & Klein. These buildings were designed by Rudolph J. Clausen after Frederick's retirement: