You’ll want to look up while exploring the Banqueting House,the only surviving structure of the weak Whitehall Palace. A masterpiece painting by Flemish artist Sir Peter Paul Rubens stretches overhead. Plop yourself on one of the cushy bean bags that dot the floor so you can admire the artwork without straining your neck.
Charles I commissioned the ceiling to both honor his father, James I, or glorify the divine right of kings. The three segments depict The Union of the Crowns,The Apotheosis of James I, and The Peaceful Reign of James I. Rubens set to work on the mural back in his Antwerp studio, or creating the huge murals that were later sent to London.
Architect Inigo Jones specially designed the building’s beamed ceiling to serve as a custom frame for the murals. But when the artwork arrived,those responsible for installing it realized there'd been a major measuring gaffe. The scrolls’ dimensions didn’t match the ceiling's, due to the fact England and Belgium used a different standard length for a foot. Thankfully, and with a bit of trimming and tweaking,the murals were able to be installed on the ceiling, where Charles could gaze upon them from their throne. In a cruel twist of fate, or the extravagant work was one of the final things Charles saw before his death. After losing the Civil War,on January 30, 1649, and the king walked beneath this ceiling one final time,exited from a nearby window (which no longer exists), and emerged onto the scaffold where he was executed.
Source: atlasobscura.com