Archaeologists uncover centuries-old shipwreck beneath historic city: 'Unique source of knowledge'

A centuries-old shipwreck was recently found in an unlikely place in Spain: a former fish market.

Discovered during construction work, the ship dates back between the 15th and 16th centuries. The discovery reflects Barcelona's maritime history, said ICUB.

"Starting in 1439, with the construction of the first artificial docks, the dynamics of the coastline were altered, and the sandbar known as the Tasca, which had protected the city for centuries, disappeared," said the organization's statement, which was translated from Catalan to English. 

"The combination of coastal drift, the mouth of the Besòs River, and storms caused a rapid advance of the beach, covering ancient marine spaces."

ICUB also noted that ship's main structure - a "skeleton" measuring 32 feet in length and nearly 10 feet in width - also consisted of 30 curved wooded frames. 

"At least seven stakes of the hull [were also found]," said the statement.

"The planks are nailed to the frames with circular-section wooden pegs, a type of wooden nail used to join the pieces."

"Two longitudinal pieces - palmellars or saws - fixed with iron nails are also preserved," ICUB noted. 

"This system, known as skeleton construction, was common in the medieval Mediterranean and spread throughout Europe from the mid-15th century."

Yet ICUB also cautioned that the ship's remains "are in a very fragile state of preservation" at the moment. 

The ship's survival is considered a miracle, as wood deteriorates easily.

"Although wood is a common material in historical shipbuilding, it only preserves in very specific environments, such as aquatic ones, and deteriorates rapidly when exposed to air," the government agency noted.

"The waterlogged wood is extremely sensitive, and to prevent it from drying out and degrading, it has been partially covered with the original sand that surrounded it," the statement added. 

Archaeologists plan to conduct additional work - including 3D documentation, marking, sampling, and preparing to move the ship in water-filled containers. 

The shipwreck will be transported to a facility where its wood will be desalinated, in order to preserve it.