<Tr> <Th> Added to NRHP </Th> <Td> October 8, 1976 </Td> </Tr> <P> The Oklahoma State Capitol is the house of government of the U.S. state of Oklahoma . It is the building that houses the Oklahoma Legislature and executive branch offices . It is located along Lincoln Boulevard in Oklahoma City . The present structure includes a dome completed in 2002 . </P> <P> Oklahoma's first capital was Guthrie, Oklahoma, but it moved to Oklahoma City in 1910 . Construction began on the Oklahoma State Capitol in 1914 and was completed in 1917 . Originally, it housed the judicial branch of Oklahoma, but the state's high courts moved most of their operations to the Oklahoma Judicial Center in 2011, leaving only the Supreme Court Hearing Chamber in the capitol building . </P> <P> The state capitol complex is the only state capitol grounds in the United States with active oil rigs . </P>

When did oklahoma city became the capital of oklahoma