Joseph Bamat, France 24, March 5, 2015

France’s National Archaeological Research Institute (Inrap) on Wednesday revealed the discovery of an ancient grave site, probably that of a Celtic prince, which is helping shed light on trade between some of Europe’s earliest civilizations.

Archaeologists uncovered the tomb dating from the fifth century BC in an industrial zone in the small town of Lavau, in France’s Champagne region. Inrap, which routinely scours construction sites in order to find and preserve the country’s archaeological heritage, began excavating at Lavau site in October 2014.

A 40-metre-wide burial mound of the Celtic ruler crowns a larger funeral complex, which archaeologists said preceded the royal’s final resting place, and could have first been built during the Bronze Age.

The prince was buried with his prized possessions, which archaeologists said were still being unearthed.

The most exciting find has been a large bronze-decorated cauldron that was used to store watered-down wine. Inrap said it appears to have been made by Etruscan craftsmen in what is now northern Italy.

Buried inside the cauldron was a surprisingly-well preserved ceramic wine pitcher made by Greeks.

The pieces “are evidence of the exchanges that happened between the Mediterranean and the Celts,” Inrap president Dominique Garcia recently told journalists on a field visit.

Garcia said the end of the sixth and beginning of the fifth centuries BC were characterised by the rise of Etruscan and Greek city states like Marseille in southern France.

Mediterranean merchants, seeking slaves, metals and other precious goods, opened trading channels with continental Celts, and often presented ornate goods as “a kind of diplomatic gifts” to local leaders, Garcia said.