Why were Castles built in Europe?

Norman castles were built from the 11th to 13th centuries. Castles were brought to Britain by William the Conqueror, when he invaded England from his homeland in France. Known as the Duke of Normandy, William invaded England in 1066 and, due to his victory in the Battle of Hastings, William was crowned the King of England, and became King William I. One of the most powerful ways for William to take control of his new kingdom, …

…ladder that reached the second floor, and could be removed to prevent unwanted access!) Sometimes more than one ditch and drawbridge were constructed, to make unwelcome access even more improbable. And many castles were built atop steep hillsides that would make it difficult for an invader to climb (especially carrying heavy weapons). These high locations also allowed the castle guards to see a long distance into the countryside, which was useful for detecting an invasion. ________________________________________