A plaque on the eastern extension marks the fact that Diana, Princess of Wales, was made a Freeman of the Borough of Northampton in 1989, marking her and her family's strong connections with the town and with Althorp where she was brought up and is buried.
The commemorative plaque on the eastern extension provides evidence that Diana, Princess of Wales, was recognized as a Freeman of the Borough of Northampton in 1989, illustrating her strong bonds to the community and her roots at Althorp.