Researchers who came across the remains say the remains could be more than 2,000 years old, dating back to the European Bronze Age, when humans began to show signs of early urban civilisation. The circles unearthed contained cremated human bones, and would once have been buried there as part of ancient ceremonial rituals.
Scientists discovered the circles below the field of KVV Schelde football club, which is based in East Flanders, north Belgium.
The larger of the two circles discovered measures around 180 feet in diameter, making it the largest of its kind ever found in the Flemish region.
Researchers say ancient peoples who once inhabited the area cremated their dead before buying them in order to prevent the bodies from attracting wild animals.
Clara Thys, one of the archaeologists involved in the discovery, told The Brussels Times, said: “They may not look spectacular, but they point to an ages-old civilization.
However, in some regions, such as Sub-Saharan Africa, it began as early as 2500 BC.
In Britain, the beginning of the Bronze Age can be dated to around 2,000 BC.
Although it has never been decisively proved, it is thought that new bronze tools identified with this age were brought over to Britain from continental Europe.
Interestingly, skulls from the Bronze Age are completely different to those found from the Stone Age period.
This would suggest new blood – new humans – and new ideas were brought over from Europe and changed the way of life of many early humans.
Britain was late to the Bronze Age party as Europe has enjoyed the wealth of expansion for years.
The island of Crete is largely regarded as the epicentre for the developments, which soon spread out across Europe in all directions.
It was here that the Mycenaeans created the finest bronze weapons, hailing from the southernmost tip of Russia.
They migrated and trickled down into the lowlands of ancient Greece around 2,000 BC, and soon began trading with the Minoans.
Building a large navy to attack and conquer foreign lands, they over time adapted to Minoan way of life and eventually became the major power in the Aegean Sea.