The Archaeological Institute of America (AIA) is North America's oldest and largest organization devoted to the world of archaeology. The AIA is a nonprofit group with some 200,000 Members belonging to 107 Local Societies. Mission: The Institute promotes a vivid and informed public interest in the cultures and civilizations of the past, supports archaeological research, fosters the sound professional practice of archaeology, advocates the preservation of the world’s archaeological heritage, and represents the discipline in the wider world.