The Neolithic burial near Warmington is believed to have been of some importance as at some point after the Romans arrived in Britain from AD43, they built a 12-sided building – probably a shrine – on top of the site.
At one point this collapsed and had to be rebuilt because of the pit beneath.
It was in this temple or shrine that one of the finest archaeological discoveries, an earthenware pot filled with silver Roman coins, was uncovered in 2008.
It is now housed in Warwick Museum.
Mr Freke believes the coins may have been left as a votive offering to whichever God the temple was dedicated to.
He said: “The Neolithic burial mound was already 2,000 years old by the time the Romans arrived. To have something significant enough to persist like that is quite something.”
Next to the shrine/temple structure the archaeologists have uncovered a second trench which they believe may show signs of a bank and rampart structure that may have formed a dividing line between two tribal territories in the Roman and Iron Age period.
A few hundred yards further west is a third trench which has revealed the remains of four Roman buildings – one of which contained a hearth and a beaten earth floor.
Finds suggest this may have been a workshop and smithy producing iron goods which were probably traded along an ancient trackway.
To view the dig site and see finds from the excavations, visit Warmington Heritage Group’s annual open day at the National Herb Centre on Sunday, July 13 from 11am-5pm.
There will be tours of the site and archaeological games and activities for all the family.