We just learned about the Castel del Monte.
Another famous castle is Veste Coburg built in Coburg Germany around 1000 AD.
This castle was built up on a hill, and was added onto over and over again through the years as it became a more important place.
In the 1506 a man named Martin Luther had some different ideas about the way people should go to church and study their Bible.
This made some people very upset and they wanted to put him in jail, so he went into hiding at this castle for a while, and worked on writing the Bible in the German language, which had never been done before.
This castle stayed strong for some very big battles, and one time the people inside lasted for five months while people outside tried to fight them.
It is one of the biggest castles in Germany, at over 375,000 square feet of space inside!
(from: wikipedia - veste coburg)
Kid Facts - Blast from the past: Quebec