The pictures which graced this noble house are too numerous to mention in their entirety. However, special attention may be drawn to Reynolds's beautiful portrait of Mrs. Sheridan as St. Cecilia, and the celebrated portrait of Pope by Jervas, as well as Hogarth's well known representation of Peg Woffington, Reynolds's portrait of Horace Walpole, the sleeping child by Velasquez, and the Duc de Reichstadt by Lawrence, plus examples of the great painters from the early days of the art down to Leighton and Millais.
By the early 20th century the beautiful furniture and objčts d'art were equal in value and rarity to the canvases that hung on the walls. The magnificent reception rooms, a characteristic of which was that they all communicated - and therefore, during balls and receptions, formed one vast and complete suite of apartments, as did those on the first floor - formed a fitting setting for these treasures, placing Lansdowne House amongst the half-dozen finest private palaces (to call them houses seems inadequate) in London.
Apart from the exterior, Robert Adam's beautiful work was to be seen to great perfection, not only in the details such as chimney pieces, cornices, etc., but particularly in the dining room - probably the most elaborate example of his style in existence.