Who were the French ambassadors so elegantly depicted in Holbein's masterpiece and how did King Henry VIII's astronomer become involved? Find out all this and more with Susan Foister, our Deputy Director and Director of Public Engagement. Subscribe to be the first to know about all our new videos: http://bit.ly/1HrNTFd Follow us on social media: Twitter: https://twitter.com/NationalGallery Facebook: https://www.facebook.com/thenationalgallery/ Instagram: https://www.instagram.com/national_gallery/ Help keep the museum accessible for everyone by supporting us here: https://www.nationalgallery.org.uk/support-us The National Gallery houses the national collection of paintings in the Western European tradition from the 13th to the 19th centuries. The museum is free of charge and open 361 days per year, daily between 10.00 am - 6.00 pm and on Fridays between 10.00 am - 9.00 pm. Trafalgar Square, London, WC2N 5DN https://www.nationalgallery.org.uk/