1795 Lucas Sullivant begins surveying land for the town of Franklinton, which later becomes part of Columbus.
1800 Chillicothe named territorial capital; first Statehouse erected.
1803 Ohio becomes 17th state admitted to the Union.
1809 Capital moves to Zanesville.
1812 Capital returns to Chillicothe temporarily. Columbus named the permanent capital, and 10 acres are donated by Ohioans for Capitol Square.
1816 Capital moves to Columbus.
1838 Thomas Cole, landscape painter, wins third place in design competition for Statehouse. Statehouse, as completed, favors Cole's design more than first or second place designs. General Assembly authorizes Act to begin building a new Statehouse.
1839 Cornerstone laid.
1840 Statehouse Act repealed; work stops.
1846 General Assembly passes new Statehouse Act, but prison labor shortage delays work.
1848 Money is appropriated to expedite construction.
1852 Original Statehouse burns to ground.
1857 Legislators meet in Statehouse for first time.
1859 Abraham Lincoln speaks on the east stairs of the Statehouse as part of the Lincoln/Douglas debates.
1861 Statehouse is officially completed; Lincoln speaks to a joint session of the Ohio Legislature in the House Chamber.
1865 Lincoln‘s casket is displayed in the Rotunda.
1901 Judiciary Annex (the Senate Building) is completed.
1906 Alice Roosevelt Longworth unveils the McKinley Monument. The largest known crowd (50,000 people) gathers on the Statehouse grounds for this event.
1989 Renovation Master Plan approved.
1990 Construction begins.
1993 Senate Building restoration and Atrium completed.
1996 On July 5th, 1996 a joint session of the legislature commemorated the reopening of the renovated state capitol.