| 1818 |
First General Assembly Meets Kaskaskia |
| 1820 |
Capitol moves from Kaskaskia to Vandalia |
| 1823 |
First capitol in Vandalia burns, replaced for $15,000 |
| 1836 |
Capitol in Vandalia renovated with $16,000 expended |
| 1837 |
Legislature votes to move to Springfield |
| 1839 |
Legislature first convenes in Springfield church buildings |
| 1853 |
Fifth capitol Completed, $260,000 |
| 1857 |
Governor’s Executive Mansion completed |
| 1865 |
Mather Property, located southwest of the fifth state capitol, site of Lincoln Tomb |
| 1868 |
Cornerstone laid for sixth capitol |
| 1877 |
First legislative session in capitol |
| 1888 |
Capitol building complete |
| 1902-1903 |
Armory Building (State Arsenal Building) constructed |
| 1903 |
Illinois State Museum moved from capitol |
| 1905-1908 |
Supreme Court Building constructed |
| 1915 |
Centennial Commission formed |
| 1915 |
$140,000 allocated for power plant |
| 1918 |
Stephen A. Douglas Statue unveiled |
| 1918 |
Centennial Building construction begins |
| 1921 |
Richard Yates Statue unveiled |
| 1921 |
Centennial Building landscaping and furnishing-$914,500 |
| 1922 |
Springfield Life Insurance Company Building obtained by state |
| 1923 |
Centennial Building completed |
| 1929 |
$700,000 appropriated for Centennial Building Annex |
| 1930 |
Centennial Building Annex constructed |
| 1936 |
Archives Building construction begins |
| 1939 |
Demolition of building east side of Spring Street |
| 1939 |
$65,000 appropriated for tunnel, balustrade, and terrace construction work |
| 1940 |
Sundial unveiled |
| 1947 |
Plans for new buildings in capitol complex dropped |
| 1948 |
Spanish American War Memorial unveiled |
| 1955 |
State Office Building (Stratton Building) constructed |
| 1961-1962 |
Museum Building constructed |
| 1966 |
Centennial Building addition constructed |
| 1966 |
Proud Rave Totem Pole Replica unveiled |
| 1970 |
$20,000 for demolition of buildings on College, Monroe, First, and Adams Streets |
| 1972 |
Attorney General Building constructed |
| 1975 |
Everett McKinley Dirksen statue constructed |
| 1985 |
Illinois Special Mosaic unveiled |
| 1989 |
Martin Luther King statue unveiled in original location |
| 1990 |
State Library constructed |
| 1990 |
Illinois Police Officers Memorial unveiled |
| 1992 |
Illinois Workers Memorial unveiled |
| 1993 |
Martin Luther King Statue moved to present location |
| 1999 |
Firefighters Memorial unveiled |
| 2001 |
Plans advance for proposed Police Building location north of capitol |
| 2001 |
Proposals for new State Museum in south half of Stratton Building parking lot |
| 2001 |
Renovation of Waterways Building; appropriation: $4,000,000 |
