The Villa Giulia passed into the ownership of the popes and remained there until it was taken over by the state in the present government. It was eventually finished by Popes Pius IV and Pius V, but the art treasures were scattered far and wide. During many pontificates it was used for the stopping place of ambassadors and other great personages who spent the night there before making their ceremonial entrance into Rome. Perhaps the presence of so much water and luxurious vegetation made the place peculiarly sensitive to mould and decay. Even as early as 1585 it was not considered healthful. Sixtus V, with the restless caprice of the poor sleeper, wished to spend a night there, but was forbidden to do so by his physician. As it was papal property, no private individual ever had the chance to take over the beautiful old building and gardens and keep them in repair; and those popes whose tastes might have led them to restore it built pleasure-houses or palaces for themselves. Gregory XIII began the Quirinal Palace, and not infrequently for his villegiatura visited the magnificent villa of Mondragone at Frascati which Cardinal Altemps had already begun to build. Sixtus V built his Villa Montalto, the new Lateran Palace, and finished the Quirinal Palace. Clement VIII contented himself with the Quirinal; but his great cardinal nephew, Peter Aldobrandini, founded the magnificent Villa Aldobrandini at Frascati. The Medici Leo XI devoted himself to the Villa Medici. Paul V did indeed make a restoration, using much stucco, which can easily be distinguished from the beautiful work of the original period, but that Pope’s interest was really given to the great villa which his nephew, Cardinal Scipione Borghese, was creating out of the old Villa Cenci.