The Art Institute of Chicago has recently updated their website and included a searchable database of high-resolution art. What makes this so interesting is that a lot of the art is public domain, so you can use it however you want legally. As a teacher this is a really useful resource for Art and History lessons. As an added bonus they have also created teacher resource packs that cover specific works of art or advise and guidance on how to discuss specific aspects of art, such as nudity. It’s a great resource as a whole and it’s all free, which in these times of austerity is great.