Robbo sez, "The Metropolitan Museum of Art has just released almost 400,000 visual works in an online searchable database. The images are high rez (10 megapixels) and free to download. Thank you Met!"
Well, yeah, except the terms and conditions pretend that the Met can tell you how you're allowed to use public domain art (!). Lucky for the Met that such conditions are null and void, otherwise they wouldn't be able to scan and share these images in the first place. Sheesh! Remember, faithful reproductions of works in the public domain do not attract new copyrights, as a matter of well-settled US law.