ArchitectJohn M. Van OsdelAmerican architect (1811–1891), 1811–1891Photograph of one of their buildings · Sharnak at English Wikipedia · Public domain · Wikimedia Commons3 buildingsUnited StatesFurther readingWikipedia article↗BuildingsOld MainArkansas, United StatesOld McHenry County CourthouseIllinois, United StatesWagner's BlockMarshall, United States