He needed money to satisfy the investors in his polished-metal mirror business.
Gutenberg
O.o only Gutenberg I have heard of was johann Gutenberg and he created the printing press in the 1450s
14
printing press in 1478
Mainz, Germany
Priting spress
Gutenberg didn't invent the periscope. He invented the printing press. The periscope was invented by Sir Howard Gruff in Dublin, Ireland in 1865.
Scroll down to related links and look at "Johannes Gutenberg - Wikipedia".
Gutenberg invented the movable- type printing press in 1440.
Gutenberg discovered printing press and gunpowder fireworks. He also invented awesome things.
Among others (he was a printer!) the Bible
The name of the German printer and publisher was Johannes Gutenberg (c.1398-1468). His full name was Johannes Gensfleisch zur Laden zum Gutenberg.