In the early 19th century aristocratic estate owners use to employ painters such as Turner to create landscape paintings of their estates and properties.

Turner was one such 19th century painter who in his early painting career painted many country estate mansions and was rewarded financially for his great oil painting master pieces.
George O’Brien Wyndham, third Earl of Egremont bought 20 of Turner's oil paintings in the 1800's, the Earl of Egremont owned land and estates all over in England, but his main residence was Petworth House in West Sussex, near Chichester.

The Carved Room at Petworth House: Run by the National Trust
Petworth House where many paintings were commissioned:
National Trust run Petworth House
More information can be found at the Tate gallery website here:
Tate Gallery: Turner at Petworth
"Turner seems to have visited Petworth House for the first time in the early 1790s, when he was in his late teens. But his closest links developed in the 1820s, during his late forties, when he and many other artists were regular guests."
Below is a great oil painting that Turner did called Keelmen Heaving in Coals by Moonlight from 1835, this was a time when Turner had already become an established oil painter of his time.

Amazing Keelmen Heaving in Coals by Moonlight: Turner in 1835