Public domain image of a vintage map, geography atlas, maritime navigation, age of discovery, 16th-17th century, free to use, no copyright restrictions - Picryl description
Public domain photograph of early 20th-century New York metropolis cityscape, buildings, no copyright restrictions image - Picryl description
Public domain image of an industrial building, factory, structure, works, 19th-20th century industrial revolution, free to use, no copyright restrictions - Picryl description