Birmingham Museums Trust has placed all its online images of public domain artworks under CC0. However, a charge will still be made for files over 3MB at 300dpi. At present the site is only showing low-res pictures. But the Trust say they… “will introduce a new Digital Asset Management System in late 2019”. I’m guessing that, until then, one has to manually email and ask for a large CC0 version?
Burne-Jones, sketch for Theseus and the Minotaur in the Labyrinth.