In 1109 Guigliarello Acciaiuoli came from Brescia, where his family had made a fortune by working in steel (acciaio)—hence their name. He bought many houses in Borgo S.S. Apostoli and a domain in the Val di Pesa, where he built a tower which was still standing in 1588 when Giovambattista Ubaldini wrote the Origine della Famiglia Acciaiuoli. True to the Guelph traditions the family brought with them from Brescia, Leone Acciaiuoli was forced to fly from Florence after the Ghibelline victory at Montaperti in 1260 and his palace was destroyed. On the return to power of the White, or Guelph, party, Dardano Acciaiuoli became Gonfalonier of Justice, and was afterwards sent with full powers from the Signoria of Florence, “considering his great prudence and legal knowledge,” as Captain of the People to rule Pistoja. When in 1282 the government of Florence was changed and the Priors were instituted, Riccomanni degl’Acciaiuoli, doctor of law, was elected Prior of his Sesto of the city.