 This photo made available by the City Council of Tomares on Friday, April 29, 2016, shows some of the bronze and silver-coated coins dating from the end of the 4th century Workers laying pipes in a southern... (Associated Press) 
 
 MADRID (AP) — Workers laying pipes in a southern Spanish park have unearthed a 600-kilogram (1,300-pound) trove of Roman coins in what culture officials say is a unique historic discovery. Story highlights 19 amphoras full of coins unearthed 
 
 They date from the end of the 3rd century A.D. to early 4th century A.D. 
 
 Workers digging ditches came across the treasure trove 
 
 (CNN) More than 1,300 pounds (590kg) of bronze Roman coins dating to the 3rd century A.D. have been unearthed by construction workers digging a trench in Spain. Ana Navarro, head of Seville’s Archeology Museum, offered no precise estimate for the value of the haul, saying only that the coins were worth “certainly several million euros.” 
 
 
 
 This photo made available by the City Council of Tomares on Friday, April 29, 2016, shows some of the bronze and silver-coated coins dating from the end of the 4th century.
– What should've been a simple maintenance project involving new water pipes in Spain has become something else entirely. Construction workers near Seville Wednesday stumbled upon about 1,300 pounds of bronze Roman coins from the third and fourth centuries crammed into 19 ancient amphoras, the AFP reports. The Washington Post reports that the workers noticed "irregular terrain" while toiling in a ditch a little more than 3 feet deep. Ana Navarro, head of the local museum that's now taken over the excavation project, didn't pin an exact number on the coins' value, simply stating they're worth "certainly several million euros" (which would equate to several million dollars) and that it's hard for her to assign a dollar amount because "the value they really have is historical and you can't calculate that." Navarro tells a local paper that "this find is extremely important," with "very few similar cases," per RT.com. The coins features images of emperors Constantine and Maximian, and their mint condition indicates they likely weren't in circulation. Navarro speculates the money was used to pay government taxes or the armed forces, and that the amphoras were buried "because of social conflicts, violence, [and other] threats" of the time. Navarro also notes that because the coin-filled containers are so heavy, it's probable they weren't placed underground by one person alone, CNN reports. The country's cultural department says no such coins exist in the Seville Archaeological Museum's collection, per the AP. (Another recent find involved coins hailing from the Nazi era.)