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.

The coins were found in 19 amphoras, a type of Roman jug, in Tomares, a town in Seville province.

Lola Vallejo, Tomares urban councillor, told CNN-affiliate Atlas that a crew had been digging a ditch to install electricity to a park when they came across the incredible find.

"The machines hit against something that wasn't normal for this soil," Vallejo said. "The workers immediately stopped, and soon discovered that there were many coins there, inside broken amphoras."

Primeras imágenes del hallazgo de monedas romanas de Tomares en el #MuseoArqueologico de Sevilla pic.twitter.com/5aK5fovNjj — Consejería Cultura (@CulturaAND) April 28, 2016