Each week American Artifacts takes viewers into archives, museums and historic sites around the country. The American Antiquarian Society in Worcester, Massachusetts, is an independent research library founded in 1812 by Revolutionary War patriot and printer Isaiah Thomas. The library's collection includes more than four million items and focuses on printed materials dating from the first European settlement of American through 1876 and the post-Civil War Reconstruction era. American History TV visited the American Antiquarian Society to look at some of the highlights from their collection.