The Rijksmuseum in Amsterdam has just released Rijksstudio, its new online collection of 125,000 images. You have to register (for free) in order to do much with the site, but it does then allow you to download excellent images of works from the Rijksmuseum’s peerless collection of Dutch art. The site’s Terms and Conditions do permit personal use of its images (e.g., in a Powerpoint presentation) without requiring a fee or special permission, but for commercial or professional use (including publications), you still have to apply to the Rijksmuseum by filling out an online form.
Not quite so new, but more generous in their terms of use, are the 158 collection highlights released earlier this year as part of a pilot project by the Statens Museum for Kunst (National Gallery of Denmark) in Copenhagen. These images are made available for download and unrestricted use under a Creative Commons license. That means all you have to do is credit the Museum and its website as your image source, and you are free to use these images for any purpose, commercial or not.
You can read more about Rijksstudio here and about the Statens Museum for Kunst’s pilot project here.