I discovered on usflag.org that you can buy a flag that has been flown over the United States Capitol building. It turns out anyone can write their senator or representative and request a flag. For a fee of approximately $28 you will receive an American flag and a keepsake Certificate of Authenticity from the Architect of the Capitol certifying that your flag was flown. Flag ordering information is typically found under “Services” on the Senate or House members’ web pages.

American Flag