The oldest building in Edinburgh, the tiny St Margaret's Chapel, dates back to the 12th century, and lies within the walls of the castle. The main courtyard, Crown Square, was developed in the 15th century, followed by the Great Hall, built by King James IV. In the 16th century, the Half Moon Battery was constructed, After World War I, the Scottish National War memorial was added.

The Royal apartments include a tiny room in which Mary, Queen of Scots gave birth to the boy who was to become King James VI of Scotland and James 1 of England upon the death of Queen Elizabeth in 1603. The ancient Honours of Scotland - the Crown, the Sceptre and the Sword of State - are on view in the Crown Room.

A more detailed history of the castle can be read at http://www.undiscoveredscotland.co.uk/edinburgh/edinburghcastle/, as well as some very good pictures of the castle.

The pictures in this album focus more on the internal features of the castle.