Leonardo da Vinci, ‘Studies of the Foetus in the Womb’, c.1510-12/13, black chalk, sanguine, pen, wash, on paper, Collection of Her Majesty the Queen.
Her sense of fashion may be a little out, but Her Majesty the Queen has long been a collector of some particularly distinguished artworks. Not only does she hold numerous drawings by Leonardo da Vinci, her collection also contains decorative objects, oil paintings, and prints (and more!) by artists from all over the world and from various periods. Take a look: https://www.royalcollection.org.uk/