Free - Go to the art gallery and download. License automatically granted so you do not need to ask. Non commercial Resale prohibited. Modification of images prohibited - except resizing using same aspect ratio Use restricted to websites and organizations that do not make money. Softcopy or hardcopy re-distribution is permitted providing the following conditions are met.
Images are free.
It is easy for others to see where the image is from. Use on church projectors is welcome. My only request is that it is easy for viewers to be able to find out where the images came from. For example if there is an appropriate space for a credit in the service bulletin. If you host a wallpaper collection please ask first - generally you can have up to 5.