Archaeologists have begun excavating the basement of Norwich Castle to unearth more about it's historic past.
It is part of a £13 million pound project to transform the Castle's iconic Norman Keep.
It's the first major excavation of it's kind on the Castle since the 1990s.
The aim is to shed light on the origins of Norwich's stone Keep, one of the most architecturally sophisticated buildings in northern Europe when it was built at the start of the twelfth century. it will also allow examination of the makeup of the castle mound, which is the largest example of a 'motte' in Britain.