How Do We Know About Castles?There are several ways we know about castles. You can probably suggest some of them. One way is from documents. Here is a document about a castle from a time when it was strengthened. A man wishes to turn his houses into castles, and he must have permission from the King before he can do this. Because the document is written in medieval French, we have translated it into modern English for you. Run your mouse over the document, and see if you can answer the questions below.