"Nightwings" is a science fiction novella by American writer Robert Silverberg.

According to Silverberg's introductions, the changes required to turn the three shorter works into a novel were relatively minor.

The main character in the novella is a Watcher whose mission is to watch the skies with some sophisticated equipment and to inform the Defenders in the event of an alien invasion.

Along with a young Flier girl and a Changeling (who belongs to no guild), he visits the old city of Roum (suspected previously to be called Rome), and becomes entangled in events including the possibility of invasion.

Apart from Roum, a number of other great cities are mentioned including Jorslem (Jerusalem), Stambool (Istanbul), Marsay (Marseilles), Donsk (Gdańsk), Nayrub (Nairobi), Dijon, Palerm (Palermo) and Perris (Paris), but their greatness is relative, as they only have a few thousand inhabitants.