A church linked to a former slave who wrote a book for 18th century Britons highlighting the savagery of the trade, is being honoured by English Heritage.
Singer Youssou N'Dour holds a stamp showing Olaudah Equiano
The autobiography of Olaudah Equiano, who lived in Cambridgeshire for many years, focussed on the slave trade.
The Grade I-listed Church of St Andrew in Church Street, Cambridge, contains a plaque commemorating his daughter.
English Heritage has been marking the 200th anniversary of the abolition of the slave trade.
The role of Olaudah Equiano was played by Youssou N'Dour in the film Amazing Grace.