Catherine Douglas was a Scottish noblewoman known for her bravery during the 15th century. She is most famous for her role in the rescue of James I of Scotland, who was imprisoned in England. When an assassination attempt was made on him, she attempted to save his life by using her own arm to block the door, which has become a symbol of loyalty and courage. Her actions are often highlighted in historical accounts, showcasing the dangers faced by nobles during this turbulent period. Catherine's story is a reminder of the sacrifices made by individuals in the name of loyalty and the protection of their leaders.