We’ve often featured the work of the Public Domain Review here on Open Culture, and also various searchable copyright-free image databases that have arisen over the years. It makes sense that those two worlds would collide, and now they’ve done so in the form of the just-launched Public Domain Image Archive (PDIA). The Public Domain Review invites us to use the site to “explore our hand-picked collection of 10,046 out-of-copyright works, free for all to browse, download, and reuse” — and note that the number will grow...