By 1888, at the initiative of the Fifth Earl, building work was well under way at the south-eastern end of London's Sloane Street to rebuild Holy Trinity Church to the design of the leading Arts and Crafts architect John Dando Sedding. Cadogan funded the entire initial operation, including the commissioning of numerous fittings for the new building by leading sculptors and designers including Henry Wilson (who assumed overall artistic control when Sedding died prematurely), Onslow Ford, Edward Burne-Jones, William Morris, Nelson Dawson and Henry Hugh Armstead. Money was found for the installation of a great organ by James John Walker, which quickly became famous for its cathedral-like effect in the opulent acoustic of the building. The church (and its fittings, including the organ) remain a testament to a very particularly focussed example of aristocratic patronage.