Where are the letters of Mary Stuart?

The letters of Mary Stuart, also known as Mary, Queen of Scots, are primarily housed in various collections and institutions across the UK and Europe. Significant holdings can be found at the National Archives of Scotland, the British Library, and the Bibliothèque nationale de France. Additionally, some of her correspondence is held in private collections and has been published in various historical compilations. These letters provide valuable insights into her life, reign, and the tumultuous political landscape of the time.