Edinburgh Castle is a historic castle in Edinburgh, Scotland. It stands on Castle Rock, which has been occupied by humans since at least the Iron Age, although the nature of the early settlement is unclear. There has been a royal castle on the rock since at least the reign of David I in the 12th century, and the site continued at times to be a royal residence until 1633. From the 15th century, the castle's residential role declined, and by the 17th century, it was principally used as military barracks with a large garrison. Its importance as a part of Scotland's national heritage was recognized increasingly from the early 19th century onwards, and various restoration programs have been carried out over the past century and a half.

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