Question: Of what nationality are James Hanley the novelist, short story writer and playwright of Irish descent, and Kenneth Clark, the art historian, museum director and broadcaster?

Context articles: The Furys Chronicle
Saltwood Castle
Roger Fry
Hartwig Fischer
Kenneth Clark
James Hanley (novelist)
Kenneth Clark (disambiguation)
Society for Renaissance Studies
Earl A. Powell III
The Return of the Prodigal Son (Rembrandt)

The Furys Chronicle is a sequence of five novels, published between 1935 and 1958, by James Hanley (1897–1985).
 The main setting is the fictional, northern, English town of Gelton, which is based on Liverpool, where Hanley was born, and involves an Irish Catholic family of seafarers, similar to Hanley's own.
 The action takes place between 1911 and 1927.
 The first novel in the series, "The Furys", was Hanley's sixth novel.
Saltwood Castle is a castle in Saltwood village, one mile (2 km) north of Hythe, Kent, England.
 Of 11th century origin, the castle was expanded in the 13th and 14th centuries.
 After the Norman Conquest, the castle was appropriated by the Archbishop of Canterbury Lanfranc and remained the property of the archbishops, with some interruptions, until 1540, when Thomas Cranmer was compelled to cede it to Henry VIII.
 The castle is reputed to have been the meeting place of the four knights who carried out the assassination of Thomas Becket in 1170.
 By the 19th century, it was "largely ruinous" and restorations to make portions of the castle habitable were carried out in the 1880s and 1930s.
 In the late 19th century, the castle was bought by an ancestor of Bill Deedes, the journalist and politician, who grew up there.
 In the 20th century, it was sold to Sir Martin Conway who commissioned Philip Tilden to undertake a restoration.
 In 1953, the castle was bought by the art historian Kenneth Clark (1903–1983), and then became the home of his son, the politician and diarist, Alan Clark (1928–1999).
 It remains the private home of his widow, Jane Clark.
 The castle is a Grade I listed building.
Roger Eliot Fry (14 December 1866 – 9 September 1934) was an English painter and critic, and a member of the Bloomsbury Group.
 Establishing his reputation as a scholar of the Old Masters, he became an advocate of more recent developments in French painting, to which he gave the name Post-Impressionism.
 He was the first figure to raise public awareness of modern art in Britain, and emphasised the formal properties of paintings over the "associated ideas" conjured in the viewer by their representational content.
 He was described by the art historian Kenneth Clark as "incomparably the greatest influence on taste since Ruskin ... In so far as taste can be changed by one man, it was changed by Roger Fry".
 The taste Fry influenced was primarily that of the Anglophone world, and his success
Hartwig Fischer (born 14 December 1962) is a German art historian and museum director.
 Since April 2016, he has been Director of the British Museum; he is the first non-British head of the museum since 1866.
 From 2012 to 2016, he was Director of the Dresden State Art Collections.
Kenneth Mackenzie Clark, Baron Clark, (13 July 1903 – 21 May 1983) was a British art historian, museum director, and broadcaster.
 After running two important art galleries in the 1930s and 1940s, he came to wider public notice on television, presenting a succession of series about the arts during the 1950s and 1960s, culminating in the series "Civilisation" in 1969.
James (Joseph) Hanley (3 September 1897 – 11 November 1985) was a British novelist, short story writer, and playwright of Irish descent.
 He published his first novel "Drift" in 1930.
 The novels and short stories about seamen and their families that he wrote in the 1930s and 1940s included "Boy" (1931), the subject of an obscenity trial.
 Hanley came from a seafaring family and spent two years at sea himself.
 After World War II there was less emphasis on the sea in his works.
 While frequently praised by critics, Hanley's novels did not sell well.
 In the late 1950s, 1960s, and early 1970s he wrote plays, mainly for the BBC, for radio and then for television, and also for the theatre.
 He returned to the novel in the 1970s.
 His last novel, "A Kingdom", was published in 1978, when he was eighty.
Kenneth Clark (1903–1983) was an English art historian and TV presenter.
The Society for Renaissance Studies is an academic society whose aim is to provide a forum for all those interested in studying the Renaissance.
 It pursues this though various meetings and publications and providing this and other support for interdisciplinary teaching and research.
 The society was formed in 1967 with a founding general meeting being held at the Institute of Historical Research.
 This meeting was chaired by the noted art historian Ernst Gombrich and amongst those participating was Kenneth Clark.
Earl Alexander Powell III (born October 24, 1943), nicknamed Rusty Powell, is an American art historian and museum director.
 From 1980 to 1992, he was Director of the Los Angeles County Museum of Art.
 He was appointed Director of the National Gallery of Art in Washington, D.C., in September 1992.
 He was appointed to the U.S. Commission of Fine Arts in 2003 and elected chairman in 2005.
 He was appointed to a second four-year term on August 30, 2012, and continues to serve as chairman.
The Return of the Prodigal Son is an oil painting by Rembrandt.
 It is among the Dutch master's final works, likely completed within two years of his death in 1669.
 Depicting the moment of the prodigal son's return to his father in the Biblical parable, it is a renowned work described by art historian Kenneth Clark as "a picture which those who have seen the original in St. Petersburg may be forgiven for claiming as the greatest picture ever painted".