Note 520 — CANTO XVIII.
James Romanes Sibbald translation
A rule of road: In the year 1300 a Jubilee was held in Rome with Plenary Indulgence for all pilgrims. Villani says that while it lasted the number of strangers in Rome was never less than two hundred thousand. The bridge and castle spoken of in the text are those of St. Angelo. The Mount is probably the Janiculum.