Old Perry County Courthouse
... that Ohio's Old Perry County Courthouse, built in 1829, is the oldest building in the former Northwest Territory continually used as a government building?
... that Ohio<span about="#mwt17" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"`","href":"./Template:`"},"params":{},"i":0}}]}' id="mwpQ" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span></span>s <b id="mwpg"><a href="./Old_Perry_County_Courthouse_(Ohio)" id="mwpw" rel="mw:WikiLink" title="Old Perry County Courthouse (Ohio)">Old Perry County Courthouse</a></b>, built in 1829, is the oldest building in the former <a href="./Northwest_Territory" id="mwqA" rel="mw:WikiLink" title="Northwest Territory">Northwest Territory</a> continually used as a government building?