Public domain illustrated book or album page scan, related to architecture, free to use, no copyright restrictions image - Picryl description
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
Public domain scan of a technical diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description
Public domain photograph of a machine part, motor, equipment, free to use, no copyright restrictions image - Picryl description
Public domain reproduction of illuminated book page, free to use, no copyright restrictions image - Picryl description