Mary Knatchbull (1610 – 6 March 1696) was abbess of the Convent of the Immaculate Conception in Ghent in what is now Belgium.

Her aunt led the group and she commissioned a new building on the banks of the River Scheldt which they moved to in 1628.

[3] Meanwhile the exiled Charles II was in Europe and Knatchbull enjoyed a close relationship with the King and his court.

She was considered one of the finest of abbesses and a person who played an important role in Charles II's restoration to the throne in 1660.

Knatchbull never saw the £3,000, but she did manage to obtain £1,000 after twice travelling to London to remind the new King of his debt to the nuns of Ghent.