The Capitol was constructed between 1871 and 1886. It is the only five-domed state capitol in the country. The main dome of the capitol is gilded in tissue-paper thin sheets of pure 23-karat gold and is 275 feet (84 m) tall.
At the start of the music video for 'Dead Memories' by heavy metal band Slipknot, the lead singer is seen leaning on a shovel outside Iowa State Capitol.
The first floor includes the governor's office, the Supreme Court chamber, and other offices.