Annin & Co., who has been making flags for sailing ships in a Manhattan loft since the 1820's. They incorporated when James K. Polk was in the White House and since, the company has racked up an impressive list of accomplishments including making the flag flown at every Presidential inauguration since 1847 and the flag the Apollo 11 astronauts planted on the moon in 1969. Read more about their intriguing history here.
I like their "Star Spangled Banner" flag (shown) and the many other historical flags the company offers, but you'll also find a complete array of flags for use indoors and out. http://www.flagstuff.com/american-flags/index.html