Pipeline Workers Found a 400-Year-Old Shipwreck in the Baltic, and One Object on Board Still Baffles Experts

Off Germany’s Bay of Greifswald, the benignant of underwater survey that usually produces charts and clearance reports alternatively turned up a severely deteriorated woody sailing vas buried successful dense silt astir 25 feet down, close successful the way of a planned state pipeline adjacent Lubmin. A five-person unit of commercialized divers and maritime archaeologists squeezed successful 22 dives implicit a small much than 12 days earlier dredging resumed, documenting much than 60 artifacts from footwear soles to pulley blocks. Tree-ring dating connected recovered oak timbers places the vessel successful the aboriginal 1600s, but 1 find is inactive resisting each tidy label: a level yellowish clay ceramic pierced with 4 oregon 5 cone-shaped holes and fitted tightly into an oak block. “To date, nary nonstop parallels oregon definitive mentation of the object’s relation person been identified,” University of Warsaw underwater archaeologist Michał Grabowski wrote.

A pipeline survey seldom reads similar a page-turner. Yet successful bluish Germany, a pre-construction cheque for an underwater state enactment turned into the benignant of find that makes engineers and archaeologists stock the aforesaid anxious calendar. The story, archetypal aired broadly successful September 2026 coverage, starts with a muddy spot of Baltic h2o and ends with a tiny entity cipher tin rather explain.

The unexpected find beneath the Baltic

During 2023 survey enactment successful the Bay of Greifswald, crews recovered a antecedently unknown, highly deteriorated woody sailing vas wherever a pipeline way was being prepared. The wreck sat successful dense silt nether astir 25 feet of water, adjacent the rima of the Peene Strait and astir 1.9 miles northbound of the LNG installation astatine Lubmin. The archetypal study describes it arsenic a clinker-built hull, with planks fastened by robust nails and sealed with a premix of tar and carnal hair, per discovered successful 2023 coverage.

Tree rings, accelerated dives, and a moving ship

The ship’s property was pinned down done dendrochronology: tree-ring investigation of recovered oak timbers showed the wood was felled betwixt 1626 to 1639. A 5-person squad of commercialized divers and maritime archaeologists past compressed their enactment into 22 dives implicit a small much than 12 days, racing to papers and retrieve worldly earlier dredging resumed, according to 1626 to 1639 reporting.

Led by Michał Grabowski of the University of Warsaw, the rescue excavation logged more than 60 artifacts, including footwear soles, rope, pulley blocks, an anchor, and tube staves. One standout was a hollowed-out oak trunk astir 11.8 feet long, thought to beryllium the ship’s bilge pump. Grabowski besides pointed to carpentry tools, including a hand-drill brace grip helium said “closely resembles examples recovered from the Mary Rose shipwreck,” hinting astatine an onboard repair workshop.

The ceramic that won’t springiness up its secret

Then there’s the entity that keeps this from feeling similar a tidy catalog: a flat, yellowish clay ceramic astir 5 by 3 inches, pierced by 4 oregon 5 cone-shaped holes, fitted tightly into an oak block. “I had nary thought what it was, but I truly wanted to lick the mystery,” Grabowski said. His preliminary proposal is practical, that it whitethorn person been an improvised sharpening instrumentality for drill bits oregon chisels, but helium added: “To date, nary nonstop parallels oregon definitive mentation of the object’s relation person been identified.”

Protection now, bigger questions later

What bash you bash erstwhile concern timelines collide with a 400-year-old hull? In this case, the pipeline way was rerouted astir the site, and divers covered the remains with sandbags. A follow-up inspection dive successful 2024 recovered the wreck inactive safely buried, portion Grabowski’s preliminary study appeared successful the International Journal of Nautical Archaeology successful 2026, alongside wider attraction to the clinker-built hull. The ship’s name, location port, destination, and cargo stay unknown, but the enigma ceramic is present portion of the record, waiting for its lucifer successful history.