The SMITHSONIAN'S NATIONAL POSTAL MUSEUM is located in the historic City Post Office Building, which was constructed in 1914 and served as the Washington, DC, post office from 1914 through 1986. It showcases the largest and most comprehensive collection of stamps and philatelic material in the world. DANIEL A. PIAZZA is the Chief Curator of Philately. LYNN HEIDELBAUGH is a curator specializing in the history of postal service in the U.S. ALISON R. BAZYLINSKI is a curator specializing in U.S. cultural history and material culture. SUSAN N. SMITH is the Museum's Winton M. Blount Research Chair.