Hamburg, Germany: Sparkling flying boats — 1704
People saw the sky “crisscrossed with sparkling boat-like objects” chasing one another,
blending and separating, multiplying in plain view. We have too little information to conclude they saw an aurora borealis.
Source: Yves Naud, UFOs and Extraterrestrials in History (Geneva: Ferni, 1978), vol. II, 176. Case: W267