This is one of the “Columbus” doors from the main set of doors of the U.S. Capitol on the east facade. Since the public is no longer allowed up the steps, this view from below does not show the bottom section of the door.
The Columbus doors were designed by Randolph Rogers. They are made of bronze, and are 17 feet tall and weigh 20,000 pounds. They were made in 1863, and moved in 1961 as the east facade was extended. Some of the panels are currently under renovation and have been removed from the door.