London's National Gallery was receiving a much-needed clean with a high-powered jet wash during the night, by a private cleaning company.

The area was extremely quiet for that time of the night, I was expecting to see many tourists, as well as homeless people, who usually congregate outside, sitting along the small wall of the museum, but the area was eerie quiet, except for the high-powered jet wash, as well as the faint sound of Trafalgar Squares two fountains.

The National Gallery is an art museum, founded in 1824, it houses a collection of over 2,000 paintings dating from the mid-13th century to 1900 century.

Even at night, you can really see the difference in the "before and after" clip in the footage of how dirty it actually was.