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Galileo Galilei Galileo was a devoted Catholic, a gifted astronomer, philosopher, and inventor. He was also a non-conformist, who was tried and convicted for crimes against the Catholic Church. From one extreme to the other, Galileo made a mark on science and the human race. He earned a place in history that will not be forgotten. Galileo Galilei was born in Pisa, Italy on May 4, 1564. In 1570, his family moved to Florence. There, Galileo lived through his teenage years. At age 17, Galileo went to the University of Pisa to study medicine, the field his father wanted him to follow. He stayed in medical school long enough to invent a device called a pulsilogia (Wallace 2-9). This was a tool that was used to measure a patient’s pulse. Galileo designed it based upon the pendulum. Eventually Galileo left medical school. While at the University of Pisa, Galileo discovered his interest in Physics and Mathematics. He wanted to return to his main interest, which was Mathematics. In 1585, he decided to leave the university without a degre