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.[1] Clausen has been termed the "premier 19th century architect" of Davenport, Iowa.[2]: 22
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