1086 – Herlavestune (estate or farm or Herelaf) mentioned in Domesday Book.
1174 – William de Mortimer built first church on property.
1227 – Owned by Mortimers of Norfolk.
1340 – Edmund de Surynford built “old” manor house.
John O’Gaunt, Duke of Lancaster, son of Edward III, used as a hunting lodge – manor was fortified by a moat.
14th and 15th centuries – owned by Thisnblebys, Ricards and Bluets.
1619 – Daniel de Ligne, Flemish refugee from religious persecution, purchased Harlaxton for £8000. He was knighted by James I and was High Sheriff of Lincolnshire.
1738 – George Gregory, lawyer for the family that left Harlaxton with no apparent heir, married Anne Orton, whom Gregory claimed was a newly discovered heir. George Gregory became lord of the manor.
1775 – Original manor reported desolate, although still containing considerable collection of art.
In 1831 Salvin commissioned his assistant, James Deason, to create a series of sketches of the Old Manor which are now held in the RIBA collection. https://www.architecture.com/image-library/ribapix.html?keywords=harlaxton%20old%20manor
Holme, Charles (Ed.) 1915. Old English mansions. The Studio : London. Available online: https://openlibrary.org/books/OL7096463M/Old_English_mansions [Accessed June 2014]