Designed by Skidmore, Owings & Merrill and built of reinforced concrete clad in Sardinian granite,[2] Republic Plaza includes 1,200,000 square feet (110,000 m2)[3] of office space, and three retail levels containing shops, restaurants, and service businesses.

The building has a 3-story marble lobby that features a quarterly "Art in Public Places" program of Colorado and regional artists.

On October 27, 2007, the building's top 20 stories were lit in purple with giant white letters "C" and "R" to celebrate the Colorado Rockies' World Series debut.

[4] The Republic Plaza was built by PCL Construction Services, Inc.[5] The Republic Plaza is the former home to the American Lung Association in Colorado's "Anthem Fight for Air Climb".

Now it is home to the "Mile High Stair Climb", benefitting the American Lung Association in Colorado.