The remains of a 14th century medieval manor house are being excavated beneath Walthamstow Stadium's former car park prior to development of the site.
A section of the car park site opposite the stadium in Chingford Road is currently being excavated by archaeologists from University College London (UCL).
The manor house, known as Salisbury Hall, was demolished in the 1950s.
Salisbury Hall was one of five manor houses in the area built during the 14th century.
It was controlled by Henry VIII during his reign and later by Queen Elizabeth I, whose tutor Sir Roger Ascham resided there for £20 a year.
The site was last excavated in the 1950s by the Walthamstow Antiquarian Society where it is thought many of the remains may have been destroyed or damaged.
Salisbury Hall was used by the Home Guard during the Second World War but was torn down in the in the 1950s although it is not known why other than its value had depreciated greatly and was believed to have dilapidated.
Following the closure of the dog track, the car park was bought by HCT Group to transform into a bus depot.
But in October 2013, a section of the site was sold to Peugeot-Citroen Automobiles UK.
The company provided funding for Archaeology South East to carry out the dig prior to the construction of a new dealership.
For more on this story see this week's Waltham Forest Guardian and Chingford Guardian - out Thursday