9. A Painting of the Queen Sitting on a Blue-colored Horse
Given to: Elizabeth II, the queen
Given by: German President Joachim Gauck
Estimated Value: Not provided
Queen Elizabeth’s love of horses is well-documented, so it’s no surprise that German President Joachim Gauck gifted her a painting of herself as a child riding a blue horse.

An Image of the Queen Perched atop a Blue Hors Pool/Getty Images
The modern artwork, painted by Nicole Leidenfrost, was intended to highlight the Queen’s royal heritage. However, the choice of a "royal blue" horse sparked mixed reactions, with some critics calling the painting "unusual" and "controversial."