Mary of Guelders (; c. 1434/1435 – 1 December 1463) was Queen of Scotland by marriage to King James II of Scotland. She ruled as regent of Scotland from 1460 to 1463. Background She was the daughter of Arnold, Duke of Guelders, and Catherine of Cleves. She was a great-niece of Philip the Good, Duke of Burgundy. Burgundian court Philip and his wife Isabella of Portugal at first planned to have Mary betrothed to Charles, Count of Maine, but her father could not pay the dowry. Mary stayed on at the Burgundian court, where Isabella frequently paid for her expenses. Mary attended Isabella's daughter-in-law Catherine of France, while she herself was attended upon by ten people. The duke and duchess then started negotiations for a Scottish marriage. Philip promised to pay her dowry, while Isabella paid for her trousseau. William Crichton came to the Burgundian court to escort her back to Scotland. Queen of Scotland Mary landed in Scotland in June 1449. Her arrival was described by Mathieu d'Escouchy. She first visited the Isle of May and the shrine of St Adrian. Then she came to Leith and rested at the Convent of St Anthony. Both nobles and the common people came to see her as she made her way to Holyrood Abbey in Edinburgh. Mary married King James II of Scotland at Holyrood Abbey on 3 July 1449. A sumptuous banquet was given, while the Scottish king gave her several presents. Immediately after the marriage ceremony, she was dressed in purple robes and crowned queen by Abbot Patrick. It had been agreed that any sons they might have would have no right to the duchy of Guelders. Queen Mary was granted several castles and the income from many lands from James, which made her independently wealthy. In May 1454, she was present at the siege of Blackness Castle, and when it resulted in the victory of the king, he gave it to her as a gift. She made several donations to charity, such as when she founded a hospital just outside Edinburgh for the indigent; and to religion, such as when she benefited the Franciscan friars in Scotland. Regency After her husband's death, Mary ruled as regent for their son James III of Scotland until her own death three years later. Mary was drawn into the Wars of the Roses taking place in England at this time. She appointed