It’s surprising how sometimes the most unexpected things can occur and then eventually tend to become something historic. Construction workers in Spain were pleasantly surprised to discover amazing treasures while digging a ditch. They unearthed 1,300 pounds (approx. 590 kg) of ancient Roman coins in 19 big antique jugs dating back to around the 3rd to 4th century A.D.

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This crew of construction workers truly astonished everyone by accidentally stumbling upon these pots of treasures in April 2016.

While digging, their instruments hit upon something “unusual” that led to the discovery of some ancient jugs. As some of the jugs had broken while digging, the “treasure” eventually spilled out of them—the excited workers couldn’t help but only gaze at the ancient coins packed inside the jugs!

They found 19 jugs in all, which were later identified as amphoras, a type of Roman container, in Seville, Spain. The machines that were used for the construction might have caused the breakage of at least 10 of those jugs.

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Construction workers unearth 1,300 pound treasure trove of ancient Roman coins 

“The machines hit against something that wasn’t normal for this soil,” Tomares urban councilor Lola Vallejo told CNN affiliate Atlas.

“The workers immediately stopped, and soon discovered that there were many coins there, inside broken amphoras,” said Vallejo.

The bronze Roman coins, weighing more than 1,300 pounds, dated back to around the third to fourth century A.D. “What is incredible is a discovery of this size—there are 19 amphoras, all complete, and I can assure you that they can’t be moved by one person alone, because they weigh so much due to the coins inside,” said Ana Navarro, head of the Archaeology Museum in Seville.

Most coins that were discovered were mostly bronze, but about less than 4 percent might be silver.

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Toma ya!Hallazgo histórico en #tomares #sevilla 600 kilos de monedas romanas de bronce @CulturaAND @MANArqueologico

“These coins are, for the most part, in very good condition of conservation,” Navarro said, according to Coinworld, an American numismatic magazine.

Some experts believe the coins were “brand new” because they have no sign of use, while others assume the coins were minted to pay taxes to the Roman Empire. “We have been able to read for sure inscriptions for Diocletianus, Maximianus and Maxentius; almost certainly for Constantius I and probably for Severus II, on several coins, randomly selected,” Navarro said. “Thus at least on a preliminary basis, we could date this hoard to Tetrarchic times, a political system established by Diocletian [in] 293 to govern the vast Roman Empire that [lasted] until [the early third century] … when Constantine I defeated Majentius at the battle of the Milvian Bridge.”

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As per the report in Coin World, the bronze coins were of the follis denomination. They even appear to have a higher degree of silver content than they actually do; this might be attributed to the 5 percent silver content. Apparently, the silver seems to be concentrated on the surface, and still gives a shinier look from certain angles.

This unusual and rare-looking treasure seems to have and will surely bring forth a lot of history that is yet to be learned.

Have you ever come across any rare and unusual discovery such as this?

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Ahora en @cuatro la directora del #MuseoArqueologico de Sevilla habla del hallazgo de monedas romanas