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In page Robert Walpole:

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Walpole built Houghton Hall in Norfolk as his country seat.[citation needed] He also left behind a collection of art which he had assembled during his career. His grandson, the 3rd Earl of Orford, sold many of the works in this collection to the Russian Empress Catherine II in 1779. This collection – then regarded as one of the finest in Europe[9] – now lies in the State Hermitage Museum in Saint Petersburg, Russia. In 2013 the Hermitage loaned the collection to Houghton for display, following the original William Kent hanging plan, which had been recently discovered at Houghton.[10]