The "Stone of Fortune" has left Edinburgh Castle for the first time in more than 25 years, to travel to London for the coronation of King Charles III.
The "Stone of Fortune", an ancient symbol of Scotland's monarchy, was found by King Edward I of England in the late 13th century and taken to Westminster Abbey.
It remained in England for 700 years and was part of the coronation chair on which kings and queens were crowned.
The stone was returned for permanent display in Scotland in 1996. But it was agreed that it would return to Westminster Abbey for any future coronation ceremonies.
The 150kg red slab, also known as the Stone of Scone, is 66cm long, 42cm wide and 27cm high.

It was used for the coronation of Scottish kings for hundreds of years before it was taken by Edward I of England in 1296, during the Wars of Independence.
He made the stone part of a carved oak coronation chair, which has been used during the inauguration of 26 kings and queens in Westminster Abbey.
In July 1996, the Queen, along with Prime Minister John Major, agreed that the stone of fortune should be returned to Scotland.

It now resides next to the Crown Jewels of Scotland in the Crown Room of Edinburgh Castle.
Historic Environment Scotland, which looks after the 'stone of destiny', worked with Police Scotland to ensure it was transported safely and securely. It will be transported in a special carrier built mainly from Scots oak, which was made by HES's in-house joinery team.

Kathy Richmond, head of collections and applied conservation, said it was a huge responsibility to ensure the safe journey and return of such an important national symbol.
Mr Yousaf said the stone had a rich and varied history and had been used for centuries in coronations.
The stone will return to Edinburgh Castle in the weeks following the coronation, before heading to Perth in 2024 to be housed in the new Perth Museum.