William I (of England)
- Article from Encarta Encyclopedia provides detailed overview of William's life and reign.
- http://encarta.msn.com/encyclopedia_761579147/William_I_(of_England).html

Kids' Zone: King William I
- Profile of King William I 'the Conqueror' for children.
- http://www.royal.gov.uk/output/Page2523.asp

BBC: William I, William the Conqueror (c.1028 - 1087)
- Overview of the king who successfully invaded England and changed the course of English history.
- http://www.bbc.co.uk/history/historic_figures/william_i_king.shtml

The Normans: William I
- Outline of the reign of William I (The Conqueror).
- http://www.royal.gov.uk/output/Page18.asp

William the Conqueror
- Biography from the official site of Queen Elizabeth II.
- http://www.royal.gov.uk/output/page18.asp

William I, King of England
- Simple, kid-friendly history of William I, with links to his successors. Information based on the Columbia Electronic Encyclopedia.
- http://www.factmonster.com/ce6/people/A0852295.html