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Introduction to our exhibit on 15th century inventors

The 15th century had very famous inventors. None more famous than Leonardo Da Vinci, but there were others including Johann Gutenberg, Galileo, and William Bartruff. This exhibit will be based solely on their works to show the public their contributions to society.

Leonardo Da Vinci

Leonardo was one of the most well known inventors of the 15th century, but not only was he an inventor, he was also an artist and a sculpture. Leonardo was known as a true Renaissance man. Leonardo was so influential that a child show character was named after him. He had many inventions even though some of them were never finished. Some of the inventions he made included the ball bearing, the parachute, and the diving suit. Some of the inventions he didn't finish were the armored tank, the ornithopter, and the machine gun.

Wednesday, March 25th, 9pm

The Fourth quadrant of the seventh sector on the second planet in downtown

Johann Gutenberg

Johann Gutenberg was the man who invented the printing press. The printing press was a well used invention in the Renaissance and is still used today. Sadly Johann didn't get any money for his invention because patents didn't exist yet so people could just make their own. Gutenberg did print print the first book though. He printed the Bible first but that particular copy was known as the Gutenberg Bible.

Zacharias Janssen

Zacharias Janssen was a Dutch lens-maker who invented the first compound microscope in 1595 (a compound microscope is one which has more than one lens). His microscope consisted of two tudes that slid within one another, and had a lens at each end. The microscope was focused by sliding the tubes. The lens in the eyepiece was bi-convex (bulging outwards on both sides), and the lens of the far end (the objective lens) was plano-convex (flat on one side and bulging outwards on the other side). This advanced microscope had a 3 to 9 times power of magnification. Zacharias Janssen's father Hans may have helped him build the microscope.


Galileo was the first person to use a telescope to observe the skies (in 1609), after hearing about Hans Lippershey's newly-invented telescope. Galileo discovered the rings of Saturn (1610), was the first to see the four moons of Jupiter (1610), observed the phases of Venus, studied sunspots, and discovered many other important phenomena. In 1593 Galileo invented the thermometer. After publishing the many discoveries he made using his telescope, including the motion of the Earth around the Sun (the Copernican system), Galileo was accused of heresy by the Inquisition (in 1633).