Digital Public Library of AmericaFrom the site: "The Digital Public Library of America brings together the riches of America’s libraries, archives, and museums, and makes them freely available to the world." On rights: "Except for the Metadata, any images, video and audio delivered through the Exhibitions (the “Visual Assets”), as well as DPLA’s trademarks, logos, trade dress, look and feel, and other identifying characteristics of the Services (collectively, the “DPLA Marks”), all content delivered through the Services is made available and licensed by the DPLA under the CC BY 3.0 License."