Joseph Rose, ‘Dining room from Lansdowne House’, 1766–1769, The Metropolitan Museum of Art

overall (mantlepiece): H. 75 x W. 87 3/8 in. (190.5 x 221.9 cm)
http://www.metmuseum.org/art/collection/search/196910

Image rights: The Metropolitan Museum of Art (Rogers Fund, 1931), licensed under CC0 1.0 Universal