Palazzo Barberini. The Palazzo Barberini is a 17th-century palace in Rome, facing the Piazza Barberini in Rione Trevi.
   Today it houses the Galleria Nazionale d'Arte Antica, the main national collection of older paintings in Rome. The sloping site had formerly been occupied by a garden-vineyard of the Sforza family, in which a palazzetto had been built in 1549.
   The sloping site passed from one cardinal to another during the sixteenth century, with no project fully getting off the ground. When Cardinal Alessandro Sforza met financial hardships, the still semi-urban site was purchased in 1625 by Maffeo Barberini, of the Barberini family, who became Pope Urban VIII.
   Three great architects worked to create the Palazzo, each contributing his own style and character to the building. Carlo Maderno, then at work extending the nave of St Peter's, was commissioned to enclose the Villa Sforza within a vast Renaissance block along the lines of Palazzo Farnese; however, the design quickly evolved into a precedent-setting combination of an urban seat of princely power combined with a garden front that had the nature of a suburban villa with a semi-enclosed garden.
   Maderno began in 1627, assisted by his nephew Francesco Borromini. When Maderno died in 1629, Borromini was passed over and the commission was awarded to Bernini, a young prodigy then better known as a sculptor. Borromini stayed on regardless and the
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