Most images (unless very old) are protected by copyright.
So while use in research, study and teaching may be ok, other uses may require permission.
Images should always have full citation details (see moral rights).
ARTstor covers a range of time periods and cultures, and documents the fields of architecture, painting, sculpture, photography, decorative arts, and design.
VADS access to image databases in the United Kingdom, including the Imperial War Museum, London College of Fashion, National Education Archive and The Design Council Archive.
Dive in and see the story of Victoria's history brought to life in almost 200,000 (and growing) amazing historical images. All images in this search pool are out of copyright or available to be used.