The United States Capitol dome is the dome situated above the United States Capitol which reaches upwards to 288 feet in height and 96 feet in diameter, constructed between 1855 and 1866. The dome is composed of cast iron carefully painted to appear to be made of the same stone as the main capitol building. It is actually two domes, one inside the other, and the total weight is 14.1 million pounds. This image was captured using an 8mm fisheye lens