Residents of Basel, Switzerland experienced something in the sky at dawn on August 7, 1566. The image above is a representation – here’s a description from the Basel gazette:
At the time when the sun rose, one saw many large black balls which moved at high speed in the air towards the sun, then made half-turns, banging one against the others as if they were fighting a battle out a combat, a great number of them became red and igneous, thereafter they were consumed and died out.
The Devil's Muse 