Built in 1459 by famed architect Bernardo Rossellino, student of Leon Battista Alberti, recent major renovation has restored its utmost splendour, both internally and externally.
The architectural complex is presented as the realisation of Pius II’s ambitious humanist project for the ideal city.
The Piccolomini family lived in the Palazzo until 1962 when, by testamentary dispositions, it was transferred to the Ente morale di Siena Società di Esecutori di Pie Disposizioni.