What building is located at 39 north and 77.3 west?

The coordinates 39°N latitude and 77.3°W longitude point to an area in the vicinity of Washington, D.C. Specifically, this location is near the National Mall, which is home to several iconic buildings and monuments, including the U.S. Capitol and the Washington Monument. There is no single building at these exact coordinates, but it is a central area rich in historical significance.