Open culture is a project of free media/content of many types.
For here, free public domain images is of the most interest. so see
https://www.openculture.com/2016/05/1-8-million-free-works-of-art-from-world-class-museums-a-meta-list.html
Category: Art sources
Finding open content
A major effort among many of the world’s museums has lead to the concept of ‘open content’ – “Open content describes any work that others can copy or modify freely by attributing to the original creator, but without needing to ask for permission.” (from Wikipedia)
To help find such content, as well as actual public domain content (that out of or without copyright)
Barnes Collection Online
The Metropolitan Museum of Art
Rijksmuseum
LACMA Collections
National Gallery of Denmark
Getty - Open Content
Indianapolis Museum of Art Collection
National Gallery of Art (User's guide)
National Gallery of Art
Guggenheim: Free Books
Phillips Collection
Smithsonian Releases 2.8 Million Images Into Public Domain | At the Smithsonian | Smithsonian Magazine
Open Access FAQ | Smithsonian Institution
Search the Collection - Smith College Museum of Art
BBC - Culture - Matisse Drawings
Five College Museums/Historic Deerfield Collections Database
Sotheby’s is streaming the world’s best galleries
Step into the Metropolitan Museum of Art, the Tate galleries, or Taiwan’s National Palace Museum from your sofa.
The network is basically many short-ish videos from various galleries in major museums — not just images of art, so some good some bad news as to how useful.
Art work by the 1000’s
Once you have decided you want to show art work on your tv, once easy source is our WeLoveMuseums Digital Virtual Museum. Go over to the WLM @ Home, sign up and select your image categories or artists. There are over 10,000 images of art from ancient Egypt to recent times divided into 300 categories. Once you have created your profile, there is guidance for how to tie the image display to your device of choice.