The completed "Field of Flags" display on the National Mall in Washington DC was lit up by powerful beacons on Monday.
The display was organized by the Presidential Inaugural Committee to mark the upcoming swearing-in of President-elect Joe Biden.
Echoing the "America United" theme of inauguration week, the display features 191,500 US flags and 56 pillars of light.
The pillars symbolize every US state and territory, according to the Committee.
It added the display represented all Americans unable to travel to Washington DC to attend the inauguration due to the coronavirus pandemic.