I had the weirdest coincidence this last weekend, in that I was reading two separate books that take place in two totally different time periods and both of them mentioned the exact same architectural feature in Rome.
The Spanish Stairs (Scalinata della Trinità dei Monti) were built in the 1720s to connect the Piazza di Spagna to the church of Trinità dei Monti. I have a picture that shows the fountain in the Piazza, the church above--and on the right is the Keats-Shelley house. That's right, John Keats and Percy Shelley. John Keats lived his last days on earth looking out the window over the Spanish Stairs.
And that's where the story gets interesting.