Leonardo Fibonacci
                 Fibonacci sequence, author of Liber abaci (Book of the Abacus), famous mathematician of the Middle Ages
                 1170-1240 (70)
                 britannica.com
               
Galileo Galilei
                 Observational astronomer aka Galileo Galilei, heliocentric model (assuming the sun is at the center of it all), mathematician, polymath, inventor of the telescope, hydrostatic balance, pioneer in isochronism (pendulums), Principle of Relativity, physicist, science philosopher during the period of Renaissance, author of Two New Sciences in 1632, jury trial in 1633
                 1562-1642 (80)
                 spacecentre.co.uk
               
Giovanni Pisano
                 Gothic sculptor, classicist, Head of a Bearded Man, marble scupltures
                 1250-1314 (64)
                 britannica.com
               
Giuseppe Mazzini
                 Action Party politician, journalist, political activist, Marxist communist, founder of Young Italy (La Giovine Italia) in 1831, mobster, early godfather of the Italian mafia
                 1805-1872 (67)