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 addition to and already being operated by the Falangists) to the Spanish Legion (Legión Española or Tercio de Extranjeros). "Galileo Galilei" was one of the four boats chosen for the transfer. On 26 September 1937 "Galileo Galilei" arrived at Soller on Mallorca. She was placed under the direct command of Spanish admiral Francisco Moreno, was renamed "General Mola II" and assigned pennant number L1. However, "Galileo Galilei" retained her commander (captain Mario Ricci), senior officers and Italian crew, but they had to wear Spanish uniforms and insignia. The other three Italian submarines transferred to Tercio were ("Aguilar Tablada"), ("Gonzalez Lopez")