Who was the inspiration for the face of the Statue of Liberty?

Bartholdi wrote, " I will try to glorify the Republic and Liberty over there, in the hope that someday I will find it again here." This was in reference to his only country that had been annexed by the Germans during the Franco-Prussian War. He was asked to go to America by Laboulaye and build a statue in remembrance of the longstanding friendship between France and America.