Which United States government building in Washington, DC has a seven spiral staircase depicted in the picture?

You will find a seven spiral winding staircase in the United States Supreme Court building located in Washington, DC, the capital of the United States. Each of the staircases has 136 steps that complete the five story staircase ascending or descending from the basement to the the third floor.

The design of the staircases eliminates the need for a central support, as each individual step is anchored into the marble wall on one end and rests upon the step below it. While the staircase is not open to public use, they can be viewed from two landings on the ground floor of the building. They are a lasting testament to the precision and formal elegance of the design of the Supreme Court Building.

While not portrayed in this picture, on each floor's landing, bronze door frames are decorated with neoclassical motifs, including leaves, urns and floral decorations. In addition, four law related themes repeat: a 'lamp' representing knowledge, a 'book' inscribed with LEX, the Latin word for law, an 'owl, symbolizing wisdom and the 'Scale of Justice' symbolizing impartiality. If interested, these detailed features, can be viewed at the web site listed in the Reference.

The United States Supreme Court is located at 1 First Street NW, Washington, DC.