According to a popular story, a resident of Mechelen, Belgium, emerged unsteadily from an inn one foggy night in 1687, looked up at St. Rumbold’s Cathedral, and raised an alarm — the tower was on fire.

Residents flung open their windows and saw the same reddish glow. The rumor raised an uproar, and the mayor organized a chain of volunteers to pass buckets of water up the tower stairway.

Before they reached the top, though, the fog cleared and the alarm was called off. The red glow had been only the moon’s light shining through the tower’s red bell windows.

Ever since, residents of Mechelen have been known as Maneblussers, or moon extinguishers.