The Iowa State Capitol features a dome covered in 23-carat gold

The Iowa State Capitol, commonly called the Iowa Statehouse, is located in Des Moines. Constructed between 1871 and 1886, the building serves as the seat of the Iowa General Assembly and houses the Iowa Senate, the Iowa House of Representatives, and the Office of the Governor. It is the only five-domed capitol in the country.

John C. Cochrane and Alfred H. Piquenard were designated as architects for the project. While Cochrane resigned in 1872, Piquenard continued until 1876, followed by assistants Mifflin E. Bell and W.F. Hackney. The building commission made its final report on June 29, 1886, with a total cost of $2,873,294.59. The audit showed that only $3.77 was unaccounted for during the 15 years of construction.

The commanding feature is the central towering dome constructed of iron and brick and covered with tissue-paper thin sheets of pure 23-carat gold. The capitol building also functions as a state and international cultural facility, featuring a marble grand staircase and a Victorian-styled Law Library that is open to the public on weekdays.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons