Founded in 1987, the Tile Heritage Foundation is "dedicated to promoting an awareness and appreciation of ceramic surfaces in the United States." They sell books, historic tile catalogs and other publications, provide self-guided vintage-tile tour pamphlets ($3 per tour), and will recommend refinishers, restorers and tilemakers for your project. They also administer the Doty Research Grant, the purpose of which is to "stimulate research in the field of ceramic history and conservation." Additionally, the Foundation maintains a large photographic library and copies of images from their collection are available for a fee.
pictured: Mary Philpott's Crow