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1840	Statehouse Act repealed; work stops.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.