Focus on this artwork and analyze the Provenance.
It was almost certainly the painting on display in the library at the Escorial outside Madrid from the mid-17th century until 1809, when it was removed on the orders of Joseph Bonaparte, who had been placed on the throne of Spain by his brother Napoleon.  He presented it to a General Desolle, despite a civil servant asking him to present a less important work.  Desolle's daughter sold it after the general's death to the English collector William Thomas Beckford, on whose death in 1844 it was inherited by his son-in-law, the 10th Duke of Hamilton.  It was bought by the National Gallery for £6,300 at the 1882 Hamilton Palace Sale, a very high price for a Spanish painting at the time.
Napoleon Joseph Bonaparte 10th Duke of Hamilton the Escorial William Thomas Beckford Hamilton Palace National Gallery