Public domain scan of a technical diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.
Picryl description: Public domain image of a plan, map, park, birds' eye view, free to use, no copyright restrictions.
Public domain scan of a plan of settlement buildings, free to use, no copyright restrictions image - Picryl description
Public domain photograph - historical image of Massachusetts, United States, free to use, no copyright restrictions image - Picryl description
Public domain scan of an architecture diagram, plan, or drawing, free to use, no copyright restrictions - Picryl description.