ArchitectWilliam FosterAmerican architect in Iowa, born 1842, 1842–1909Photograph of one of their buildings · Boscophotos · CC BY-SA 3.0 · Wikimedia Commons6 buildingsUnited StatesFurther readingWikipedia article↗BuildingsE.R. Hays HouseKnoxville, United StatesLucas County Courthouse Square Historic DistrictIowa, United StatesParker's Opera HouseIowa, United StatesWapello County CourthouseIowa, United StatesWashington County CourthouseIowa, United StatesYoungerman BlockIowa, United States