The Longfellow House–Washington's Headquarters National Historic Site, also known as the Vassall-Craigie-Longfellow House and, until December 2010, Longfellow National Historic Site, is a historic site located at 105 Brattle Street in Cambridge, Massachusetts. For almost fifty years, it was the home of noted American poet Henry Wadsworth Longfellow. It had previously served as the headquarters of General George Washington, 1775-76.