BBC History: Mary, Queen of Scots: Complete biography.
Mary Queen of Scots: Biography for Mary Stuart, 1542–87.
Mary Queen of Scots: A Royal Beheading: Contains links to pictures and original documents pertaining to the fate of this Queen. Includes the letter she wrote just before her execution.
The Marie Stuart Society of Scotland: Comprehensive information on Mary Queen of Scots includes timeline and family trees.
Tudor England - Mary, Queen of Scots: In-depth biography, a timeline of key events, portraits, and an eyewitness account of Mary's execution.