https://www.npg.org.uk/blog/rss en 120 https://www.npg.org.uk/blog/restoration-or-conservation-a-four-hundred-year-old-picture Wed, 18 Sep 2013 10:00:00 +0100 https://www.npg.org.uk/blog/restoration-or-conservation-a-four-hundred-year-old-picture