Edinburgh Castle is a castle fortress which dominates the sky-line of the city of Edinburgh, Scotland, from its position atop the volcanic Castle Rock. Human habitation of the site is dated back as far as the 9th century BC, although the nature of early settlement is unclear. There has been a royal castle here since at least the reign of David I in the 12th century, and the site continued to be a royal residence until the Union of the Crowns in 1603. As one of the most important fortresses in the Kingdom of Scotland, Edinburgh Castle has been involved in many historical conflicts, from the Wars of Scottish Independence in the 14th century, up to the Jacobite Rising of 1745, and has been besieged, both successfully and unsuccessfully, on several occasions. From the later 17th century, the castle became a military base, with a large garrison. Its importance as a historic monument was recognised from the 19th century, and various restoration programmes have been carried out since.