"Sailing to Byzantium" is a novella by the American writer Robert Silverberg.

It was first published in Asimov's Science Fiction in February 1985,[1] then in June 1985 with a book edition.

They visit the lighthouse and the library; he wonders if the buildings are reproductions or authentic.

Gioia's people never work: they see the sights during the day and go to parties in the evening.

After searching in other cities, Phillips finds Gioia again in Alexandria, looking still older.

Phillips asks her to accompany him in search of those who supervise the world, creating the cities and visitors, so that Gioia's mind can be placed in an immortal visitor body.