A Florida man says he and his grandson found wooden remains of a possible 19th-century shipwreck in the Gulf Coast village of Aripeka.

For the first time ever, divers recovered artifacts from the HMS Titanic's sister ship - nearly a century after it was lost during World War I.

The ship, called the Britannic, sank in the Aegean Sea off the coast of Greece in 1916. Though designed in 1914 as a luxury cruise liner, it functioned as a hospital ship during the Great War.

The vessel sank on Nov. 21, 1916, after hitting a mine near the island of Kea, around 45 miles southeast of Athens.

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On board at the time were 1,060 people. Most survived the sinking -- though 30 people died after their lifeboats were struck by the ship's rotating propellers.

In a Sept. 16 statement, the Culture Ministry in Greece said an 11-person diving team conducted an operation to recover artifacts from the ship.

The week-long dive was conducted in May, but was unknown to the public until now.

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Pictures show divers shining lights inside the wreck of the ship, which was encrusted with algae and thick marine growth.

The wreck lies nearly 400 feet deep in low-visibility water - and yielded some fascinating treasures.

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"Among the recovered items of particular interest are the ship's lookout bell [and] the port-side navigation lamp," the ministry said in a Facebook post translated from Greek to English.

Some artifacts also shed some light on the ship's luxurious design, such as silver-plated first-class trays and tiles from a Turkish bath.

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"Ceramic tiles from the decoration of the Turkish bath were [also] found detached, [along with] a pair of binoculars," the statement added.

Officials added that the artifacts will be moved to a museum when the conservation process concludes.

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"The artifacts will be included in the permanent exhibition of the National Museum of Underwater Antiquities, now under construction in Piraeus, in the section dedicated to World War I, where the wreck of the Britannic will be a highlight," the statement concluded.

Eerie images show century-old wreck of Titanic's sister ship as divers recover artifacts for first time