Lewes Priory is a part-demolished medieval Cluniac priory in Lewes, East Sussex in the United Kingdom. The ruins have been designated a Grade I listed building. The Trust’s objectives and its principal activities are to preserve and enhance the remains of the Cluniac Priory of St Pancras in Lewes for the benefit of the public generally and especially the inhabitants of the District of Lewes, to facilitate public and archaeological access to the Priory and to advance the education of the public in the subject of the Priory and its importance in the history of England.