Ditchley Park is a country house near Charlbury in Oxfordshire, England. The estate was once the site of a Roman villa. Later it became a royal hunting ground, and then the property of Sir Henry Lee of Ditchley. The 2nd Earl of Lichfield built the present house, designed by James Gibbs, in 1722. In 1933, the house was bought by an MP, Ronald Tree, whose wife Nancy Lancaster redecorated it in partnership with Sibyl Colefax.