Somerset House, Park Lane
Somerset House (built 1769–70; demolished 1915), was an 18th-century town house on the east side of Park Lane, where it meets Oxford Street, in the Mayfair area of London. It was also known as 40 Park Lane, although a renumbering means that the site is now called 140 Park Lane.
Source: Wikipedia — Somerset House, Park Lane (CC BY-SA 4.0)