Those who travel to Edinburgh will not miss Edinburgh Castle because it is located on top of the granite of the extinct volcano and can be seen in every corner of the city centre. The charm of Edinburgh Castle lies in its ancient history. It was once a Scottish royal fort and an important military fortress, a spiritual symbol of Scotland. It became a royal bastion in the 6th century. In 1093, Queen Margaret died. The castle has since become an important royal residence and national administrative center. It has been one of the most important royal castles in Britain since the Middle Ages. At the beginning of the century, the Holyrood Palace was completed, replacing Edinburgh Castle as the main residence of the royal family.