The Royal Collection at Windsor Castle holds around 550 pieces of Leonardo's work. The Castle itself is owned by the British Monarchy and is currently occupied by the Queen of England. It was originally created by William the Conqueror. Peices of Leonardo's Treatise on Anatomy, including the depiction of the Fetus in the Uterus are held here. After the death of Leonardo, the works of the Treatise on Anatomy were lost until they were discovered in the Royal Collection at Windsor Castle in the 18th century.

Works cited

“The Exhibition.” Royal Collection Trust, Retrieved from www.rct.uk/collection/themes/exhibitions/leonardo-da-vinci-a-life-in-dra....

Norman, Jeremy. “Leonardo's Anatomical Drawings.” Leonardo's Anatomical Drawings : History of Information, Jeremy Norman & Co., Inc, 2020, Retrieved from www.historyofinformation.com/detail.php?entryid=2254.

“Windsor Castle.” Royal Collection Trust, Retreived from www.rct.uk/visit/windsor-castle?_ga=2.238711750.753324594.1583087858-217....