Question: What eminent English architect created designs for Devonshire House?

Context articles: Asian Institute
Charles Allom
Devonshire House, Battersea
William Kent
Denys Lasdun
Henry Steiner
Devonshire House Preparatory School
Harriet Leveson-Gower, Countess Granville
Devonshire House
Old Devonshire House

The Asian Institute is a research centre at the Munk School of Global Affairs at the University of Toronto, and is located in the historical Devonshire House, a former residential hall of the university's Trinity College.
 Ritu Birla is the Richard Charles Lee Director of the Asian Institute.
Sir Charles Carrick Allom (1865–1947), grandson of architect Thomas Allom and painter Thomas Carrick, was an eminent English decorator, trained as an architect and knighted for his work on Buckingham Palace.
 Among his American clients in the years preceding World War I was Henry Clay Frick, for whom Allom furnished houses in cooperation with Sir Joseph Duveen, the eminent paintings dealer.
 Allom furnished the Henry Clay Frick House at 71st Street and Fifth Avenue that today houses the Frick Collection, and the neo-Georgian house, "Clayton", in Roslyn, Long Island, designed by Ogden Codman, Jr., that was bought for Frick's daughter-in-law.
 For the grand rooms of parade in Frick's New York house, Sir Charles, whose London workshops produced the plasterwork and "boiseries", kept the furnishings muted, not to compete with Frick's collection of paintings.
 In 1925, when William Randolph Hearst purchased a real castle, St. Donat's in Wales, his choice to furnish it naturally fell upon Sir Charles.
Devonshire House is an 18th-century house at 44 Vicarage Crescent, Battersea, London.
 It is a listed Grade II* on the National Heritage List for England along with its iron gate and railings.
 The interior of the house contains its original paneling.
William Kent (c. 1685 – 12 April 1748) was an eminent English architect, landscape architect and furniture designer of the early 18th century.
Sir Denys Louis Lasdun, CH, CBE (8 September 1914, Kensington, London – 11 January 2001, Fulham, London) was an eminent English architect, the son of Nathan Lasdun 1879-1920, and Julie (née Abrahams 1884-1963.
 Probably his best known work is the Royal National Theatre, on London's South Bank of the Thames, which is a Grade II* listed building and one of the most notable examples of Brutalist design in the United Kingdom.
Henry Steiner is an Austrian graphic designer, best known for his corporate identity designs.
 He has created designs for some of the most identifiable brands, such as IBM, Hyatt Regency, Hilton Hotels, Dow Jones, HSBC, Standard Chartered, Unilever, and was commissioned to design the city's bank notes by the Hong Kong government in 1975.
 Steiner was educated at the Sorbonne and at Yale.
 In 1964, he founded his own consultancy firm, "Steiner&Co", in Hong Kong.
Devonshire House preparatory school is a co-educational independent IAPS day school for children from 2½ to 11 for girls and to 13 for boys.
 The School is based in four large Victorian houses in Hampstead.
 The School currently has about 580 pupils with just over half boys.
Henrietta Elizabeth "Harriet" Leveson-Gower, Countess Granville ("née" Cavendish; 29 August 1785 – 25 November 1862) was a British peeress and society hostess.
 She was born in Devonshire House as the second daughter of William Cavendish, 5th Duke of Devonshire by his wife, the political hostess Lady Georgiana Spencer.
 Despite her parents' turbulent marriage, Harriet had a happy childhood.
 Her mother's death in 1806 led to an unpleasant situation in which her father's long-time mistress Lady Elizabeth Foster took control of the Devonshire household; as the unmarried eldest daughter, this should have been Harriet's role.
Devonshire House in Piccadilly was the London residence of the Dukes of Devonshire in the 18th and 19th centuries.
 It was built for William Cavendish, 3rd Duke of Devonshire, in the Palladian style, to designs by William Kent.
 Completed circa 1740, it stood empty after World War I and was demolished in 1924.
Old Devonshire House at 48 Boswell Street, was located between Theobald's Road in Bloomsbury, and Queen Square, London.
 William Cavendish, 3rd Earl of Devonshire had the house built in 1668 for his son, also called William Cavendish, who was MP for Derby at that time and eventually became 1st Duke of Devonshire in 1694.
 This house was later sold by William Cavendish, 3rd Duke of Devonshire, who built Devonshire House in fashionable Piccadilly.
 Major George Henry Benton Fletcher bought Old Devonshire House in 1932, to display his keyboard collection.
 He donated the house and his collection to the National Trust in November 1937.
 The house was destroyed in May 1941 by a Luftwaffe bombing raid on Holborn during the Blitz.
 Most of his keyboard instruments had been evacuated to Gloucestershire before the raid.
 These survived and are currently on display in Fenton House, Hampstead.