Instructions
Visit the historic site itself. Most historic places have gift shops dedicated to selling all types of collectibles commemorating the historic site and events. Also, when traveling, inquire about historic sites at the local town hall to find previously unknown opportunities to by flags from historic places.
Search for tag sales, swap meets and antique shows for collectible flags. Full-sized and miniature flags from historic places can be found at these events, and can be especially rewarding when a unique flag is found.
Search the internet for flags from historic places. Auction sites as well as flag stores and manufacturers have a wide variety of flags from historic places available for purchase.