The Flying Heritage Collection is Paul G. Allen's collection of rare military aircraft, which comprises artifacts from Germany, Japan, Russia, the United Kingdom and the United States. The Collection opened to the public in 2004 at the Arlington, Washington airfield, but in 2008 moved to a newly renovated historic industrial hangar located at Paine Field in Everett, Washington, United States. In 2013, the Flying Heritage Collection added a 22,000 square foot expansion hangar for its expanding collection.