Isolated inside our homes and apartments, our worlds have suddenly shrunk. But a striking project just made public by artists and brothers Parker and Clayton Calvert is a reminder of the expansive beauty of empty cities such as New York, Rome, Florence, and Siena.

What is especially notable about their quiet images of some of the world’s most famous places, all shot from above with a drone, is that they were taken not during the current lockdown, but on early Sunday mornings in 2014 and 2015, before most people were out and about.