Thank you to the following sources: Books:

knights and armor - written by Daisy Kerr

Knights in Shining Armor- Gail Gibbons

Castles - Creative Education

Let's Look at Castles - Rupert Matthews

EyeWitness Books: Castles

Living in Castle Times: Robyn Gee

The World  of the Medieval Knight - Christopher Gravett

Web sites:

About.com