The building was designed by William Adams Delano and William T. Aldrich. The central section of the tri-unit building is comprised of two huge, back to back, semi-circular units with side wings.
Inside is a seven-story marble spiral staircase. A massive Chandelier lights each floor. The building contains 25 murals.
Visitors and federal employees at the Ariel Rios Federal Building have expressed concerns about the appropriateness of six of these murals, including complaints that the murals stereotype Native Americans and that they contain images that are inappropriate for the workplace. Controversy over the murals is not new: The nudity depicted in the murals led to complaints when the murals were originally created. (Taken from Wikipedia)
The Environmental Protection Agency is housed in the building. The EPA, as it's known, is an agency of the federal government of the United States charged with protecting human health and with safeguarding the natural environment.