Ascanio II Piccolomini

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Ascanio Piccolomini (1590–1671) was the archbishop of Siena from 1629 to 1671.[1]

Ascanio was a mathematics pupil of Bonaventura Cavalieri.[2] He hosted Galileo in Siena.[3] According to Dava Sobel, Galileo's ability "to rise from the ashes of his condemnation by the Inquisition" and complete perhaps his most influential book, the Two New Sciences, was "due in large measure to Piccolomini's solicitous kindness".[4]

He was the younger brother of commander Ottavio Piccolomini.


  • Rufus Suter, A Note on the Identity of Ascanio Piccolomini, Galileo's Host at Siena, Isis, Vol. 56, No. 4 (Winter, 1965), p. 452


  1. ^ Archbishop Ascanio Piccolomini [Catholic-Hierarchy]
  2. ^ The Galileo Project
  3. ^ Stillman Drake, Galileo at Work: His Scientific Biography (2003), p. 357.
  4. ^ Dava Sobel, Galileo's Daughter (2000), p. 287