What important building can be found at 1600 Pennsylvania Avenue?

The country’s most iconic address, 1600 Pennsylvania Avenue, belongs to the White House. Pennsylvania Avenue, nicknamed ‘America’s Main Street,’ connects the heart of downtown Washington, D.C. directly to the President's doorstep. Pennsylvania Avenue measures 5.8 miles through D.C., but its most notable stretch spans 1.2 miles from the White House to the Capitol Building. Aerial views, showing the ebb and flow of traffic in front of the Capitol, dominate opening scenes in pop culture and the media.

Source: The Culture Trip