Lego System Castle
- Lugnet discussion board and castle set information.
- http://www.lugnet.com/castle/

Lego Castle Set Database
- Provides a list and description of each castle set in the series.
- http://guide.lugnet.com/set/?qc=*castle

Lego Castle System Set Reviews
- Rating, description, and impression of several castle sets. Archived review from rec.toys.lego.
- http://alumni.cse.ucsc.edu/~dulcaoin/reviews/noframes/index2.html

PC's Lego Empire
- Preston and Catherine Crow's models. Contains photographs of their Lego empire, raytraced castle ideas, and interesting anachronisms.
- http://www.crowcastle.net/lego/

Castle Set Reviews
- Rates and reviews for a variety of castle sets. From Adequate.com.
- http://www.adequate.com/lego/reviews/Castle/

Dan's Lego Model Gallery
- Features Blood Stone Castle and Chronicles. History of the castle, details of the medieval era, and photographs of the village, inn, ship, and war machine.
- http://www.brickmania.com/gallery_castle.html

Historical Lego Castles
- Nineteen accurate Lego models of historical castles such as Chillon Castle, Chateau d'Etampes, and Hever Castle.
- http://www.end.com/~jynx/castle/