This was a motte and bailey castle built by William I in 1070 in his conflict with Hereward the Wake to subdue the Isle of Ely.
The dig revealed large quantities of clay items, including jugs, and bowls that would have been used in everyday Norman life.
Farming and hunting tools were also found, including those made of bronze, which archaeologist's suggest date from the transition from Viking to Norman settlement after 1066.
In addition, significant amounts of clay, which was often used to cover the surface of the Motte, were found in the excavations.
The town council lacked funding to expand the search further, and the site was abandoned in early 2003.