Six hundred years ago, an unlucky knight may have fallen into or lost his sword in a bog filled with peat. That's one explanation researchers are putting forth after an incredibly well-preserved sword was found in a peat-filled bog near the town of Hrubieszów, Poland.

A construction worker who had worked in the area for the past 15 years stumbled upon the late 13th or mid 14th century weapon while using an excavator to drain the bog. Aside from the hilt, the sword had been preserved almost entirely and has since been donated to the local Stanisław Staszic Museum.

Bartłomiej Bartecki, director of the museum, told Polish science journal PAP that the two-handed weapon is a "unique find in the region"