1846
- Iowa becomes a state
1857
- Des Moines named capital city
1858
- Old Brick Capitol completed
1865
- Civil War ends
1868
- Construction legislation proposed
1871
- First cornerstone laid (November 23)
1873
- Second and permanent cornerstone laid
- Des Moines' population reaches 10,000
1886
- Exterior completion ceremony (July 4)
1904
- Fire destroys House chamber (January 4)
1907
- Legislature declares building completed (July 1)
1976
- Restoration painting begins
1981
- Preliminary exterior restoration studies begin
1983
- First stone replaced
2001
- Exterior restoration completion ceremony (April 20)
2015
- Estimated completion of interior restoration
