With the rich merchant Bartolommeo, elected a Senator in 1601, the Corsini entered into the ranks of the great landed proprietors. He bought the large feudal estates of Sismano, Cavigliano and Civitella, in the Roman States, and many of the fine villas still belonging to the family in Tuscany were either built or enlarged by him. His nephew Filippo, created Marquess of Sismano, etc., by Urban VIII. in 1629, was a partner in the Medici bank at Rome, besides having a rich silk and wool business of his own. He married Maria Maddalena Machiavelli, a rich heiress, who bought the house in Via Parione, afterwards incorporated in the large Corsini palace, where the Cardinal Giovan Carlo de’ Medici had a private theatre, and used to hold most unclerical orgies. The Grand Duke Ferdinando II. created him a Senator, and in 1644 made his son Bartolommeo Marquess of Laiatico, a title still used by the family, as is that of Marquess of Giovagallo, an estate in the Lunigiana bought by Bartolommeo from the Spanish crown. His son Filippo was a friend of the young Prince Cosimo de’ Medici, and accompanied him on a tour through Europe. The description he wrote, illustrated with water-colour drawings of the principal places they visited, is in the Laurentian library, and has been translated into English. The large palace was built by him after the design of Silvani, and the gallery augmented by the purchase of many fine pictures. His brother Lorenzo was destined to raise the fortunes of his house still higher. Elected Pope in 1730, under the name of Clement XII., it is said that he implored the cardinals to let an old, half-blind man die in peace, and to choose another pope. Clement XII. began his pontificate by dismissing Cardinal Coscia, the venal favourite of his predecessor, by reforming the administration of justice, and by replacing the debased currency by an emission of new coin. He founded the gallery of the Campidoglio, restored the Vatican, and built the fountain of Trevi, the façades of S. Giovanni de’ Fiorentini, S. Giovanni in Laterano, and several other churches. But much of this was done with money derived from the abominable _giuoco del lotto_, called by Mocenigo, the Venetian ambassador, “the curse and the ruin of the people.” It had been abolished by Benedict XIII., when Clement, under the specious pretext that his subjects would gamble and therefore had better spend their money at home, restored it. He would have left a greater name had he shown less partiality to his own family. His two nephews were summoned to Rome. Bartolommeo was created Prince of Sismano, Duke of Casigliano, and Captain-General of the Papal Guards; he identified himself entirely with the Spanish party, seduced by Charles III., who hinted that Spain would renounce in his favour her claims on Tuscany and Parma if he aided her in securing the Kingdom of Naples. The Congress of Vienna put an end to these ambitious projects,