Why did Johann Gutenberg call his invention a periscope?

Answer 1

Gutenberg invented printing. About fifteen years before the invention of printing, he marketed a very early periscope. I think the question confuses these two facts.

Gutenberg marketed a periscope in the 1430's, so pilgrims could see over the heads of people in the crowd. He actually may have invented it. I see no record of what it was called at the time, but the scientific naming conventions used in modern English would certainly give it the name periscope.

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Answer 2

This is incorrect information. Johann Gutenberg did not call his invention a periscope. He is credited with inventing the printing press with movable type in the 15th century, which revolutionized the spread of information and contributed to the rise of literacy in Europe.