Ancient Aliens - Closer Encounters

This episode suggests that alien encounters have been documented in various historical texts, citing as evidence, the 13th century book Otia Imperialia which describes an incident in Bristol, England ascribed to UFOs, the log entries of Christopher Columbus that report lights in the sky, stories of cigar-shaped craft allegedly seen over Europe during the Black Plague and Medieval art that supposedly depicts disc-shaped objects floating in the heavens.