Northumberland House. Northumberland House was a large Jacobean townhouse in London, so-called because it was, for most of its history, the London residence of the Percy family, who were the Earls and later Dukes of Northumberland and one of England's richest and most prominent aristocratic dynasties for many centuries.
   It stood at the far western end of the Strand from around 1605 until it was demolished in 1874. In its later years it overlooked Trafalgar Square.
   In the 16th century the Strand, which connects the City of London with the royal centre of Westminster, was lined with the mansions of some of England's richest prelates and noblemen. Most of the grandest houses were on the southern side of the road and had gardens stretching down to the River Thames.
   In around 1605 Henry Howard, 1st Earl of Northampton cleared a site at Charing Cross on the site of a convent and built himself a mansion, at first known as Northampton House. The Strand facade was 162 feet wide and the house's depth was marginally greater.
   It had a single central courtyard and turrets in each corner. The layout reflected medieval traditions, with a great hall as the principal room. It had separate apartments for members of the household, who would still at that time have included gentlemen attendants such as Jassintour Rozea, French Master Chef 1748 who arranged sumptuous banquets for the Duke, Charles Seymour, one of London
Wikipedia ...