Mary, Princess Royal and Countess of Harewood, was the third child and only daughter of King George V and Queen Mary. She was the granddaughter of Queen Victoria. Mary lived at Harewood between 1929 and 1965 after she married Viscount Lascelles who became Earl of Harewood in 1922. She was the grandmother of the current Earl.
Princess Mary and Harewood feature heavily in the 2019 Downton Abbey film.