Galileo Galilei was born in Pisa (then part of the Duchy of Florence), Italy, on 15 February 1564, the first of six children of Vincenzo Galilei, a famous lutenist, composer, and music theorist, and Giulia (née Ammannati), who had married in 1562. Galileo became an accomplished lutenist himself and would have learned early from his father a scepticism for established authority, the value of well-measured or quantified experimentation, an appreciation for a periodic or musical measure of time or rhythm, as well as the results expected from a combination of mathematics and experiment. Three of Galileo's five siblings survived infancy. The youngest,
Italian submarine Galileo Galilei Italian submarine Galileo Galilei Galileo Galilei was an Italian "Archimede"-class submarine built for the Royal Italian Navy ("Regia Marina") during the 1930s. She was named after a famous Italian scientist Galileo Galilei. The ships were designed by the firm Cavallini and were an enlarged version of the preceding . Among the changes were the partially double hulled design, the boats had their ballast tanks rearranged, their range, fuel capacity were increased, and the armament strengthened. The number of torpedoes was increased from 12 on the "Settembrini" class to 16. They displaced surfaced and submerged. The submarines were long, had a