This dataset was added to Europeana in December 2015 and contains many beautiful artworks from this Danish museum, all openly licensed.
Using the new media metadata methods in both the API and the Europeana website we can filter these to just those with direct links to good quality media files, which as of January 2016 consists of over 5,000 images over 1 megapixel (as a guide, typically more than 1200 pixels along the longest edge), of which nearly 2,000 are over 4 megapixels. The image shown above is a detail from an original image, directly available for download and through the API, measuring 3005 x 3588 pixels.
Image: Detail from Bruden smykkes af sin veninde, 1859, by Henrik Olrik. Statens Museum For Kunst, Denmark. CC0.
Dataset provided by Statens Museum for Kunst.