Osterley Park is a mansion set in a large park of the same name. It is in the London Borough of Hounslow, part of the western suburbs of London.When the house was built it was surrounded by rural countryside. It was one of a group of large houses close to London which served as country retreats for wealthy families, but were not true country houses on large agricultural estates. Other surviving country retreats of this type near London include Syon House and Chiswick House. The park is one of the largest open spaces in west London, although the M4 motorway cuts across the middle of it.HistoryElizabethanThe original building on this site was a manor house built in the 1570s for banker Sir Thomas Gresham, who purchased the manor of Osterley in 1562. The "faire and stately brick house" was completed in 1576. It is known that Queen Elizabeth visited. The stable block from this period remains at Osterley Park. Gresham was so wealthy he also bought the neighbouring Manor of Boston in 1572.Child and AdamTwo hundred years later the manor house was falling into disrepair, when, as the result of a mortgage default, it came into the ownership of Sir Francis Child, the founder of Child's Bank. In 1761 Sir Francis's grandsons, Francis and Robert, employed Scottish architect Robert Adam, who was just emerging as one of the most fashionable architects in Britain, to remodel the house. When Francis died in 1763, the project was taken up by his brother and heir Robert Child, for whom the interiors were created.