The United States Capitol Rotunda & Golden Rectangle

The United States Capitol rotunda is the central rotunda of the United States Capitol in Washington, D.C.. Located below the Capitol dome, is the tallest part of the Capitol and has been described as its "symbolic and physical heart."

The United States Capitol is the meeting place of the United States Congress, the legislature of the Federal government of the United States. Located in Washington, D.C., it sits atop Capitol Hill at the eastern end of the National Mall.

A golden rectangle is a rectangle whose side lengths are in the golden ratio, one-to-phi, that is, approximately 1:1.618. A distinctive feature of this shape is that when a square section is removed, the remainder is another golden rectangle, that is, with the same proportions as the first. Square removal can be repeated infinitely, which leads to an approximation of the golden or Fibonacci spiral.