The arches of Porta Nuova are almost the last trace of the inner circuit, constructed after the destruction of the city by Frederick Barbarossa, to which also belonged the Porta dei Fabbri, demolished in 1900.
Weary of politics, and obeying a natural inclination to pleasure, Julius then virtually abdicated the management of affairs, and gave himself up to enjoyment, amusing himself with the adornment of his villa, near the Porta del Popolo, and often so far forgetting the proprieties of his office as to participate in entertainments of a questionable character.
For information on artistic anatomy as applied to physiognomy see th catalogue of sixty-two authors by Ludwig Choulant, Geschichte and Bibliographie der anatomischen Abbildung, &c. (Leipzig, 1852), and the works of the authors enumerated above, especially those of Aristotle, Franz, Porta, Cardan, Corvus and Bulwer.
Titian painted Paul's portrait, and Guglielmo della Porta cast the bronze statue which now adorns his grave in St Peter's.
In his beautiful villa before the Porta del Popolo he sought to banish political and ecclesiastical anxieties from his mind.