The Royal Mile, a name popularised by guidebooks in the early 20th century, connects two of Edinburgh’s royal landmarks – Edinburgh Castle and Holyrood Palace.
It comprises a succession of connected streets, namely Castlehill, the Lawnmarket, the High Street, the Canongate and Abbey Strand.
It’s more than a mile long using current measurements, but it is roughly a Scots mile – a now redundant measurement which is 224 yards longer than the English mile used today.
The thoroughfare contains a wealth of historic buildings, including the former Tolbooth-Highland-St John's Church now used as the headquarters of the Edinburgh Festival, the Camera Obscura, the Assembly Hall of the Church of Scotland, Gladstone's Land, the High Court of Justiciary, St Giles' Cathedral, Edinburgh City Chambers, the Mercat Cross, John Knox's House, and many others.
It's also the location of the famous Heart of Midlothian, the pattern of cobbles that marks the site of the Old Tolbooth.
And every August it is taken over by street performers, actors and musicians as it becomes the epicentre of the Edinburgh Festival Fringe – with tourists packing the streets.
People have lived on the site of the Royal Mile for around 7000 years, but most of the buildings you can see today date back to the 19th century.
A smattering of far older buildings on the streets include St Giles’ Cathedral which was founded in the 12th century, John Knox House which dates back to 1490, Moubray House which was built in 1477, Huntly House which was completed in around 1570 and the much-photographed Canongate Tolbooth, from 1591.
These pictures aren’t quite so old, but provide a look at how the Royal Mile looked back in the 1950s and 1960s.
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. Queen Elizabeth II and King Olav of Norway in the Royal coach as the procession makes its way down the High Street Edinburgh during the King's state visit to Scotland in October 1962
Crowds thronged the pavements of the Royal Mile in October 1962 to catch a glimpse of the Queen with King Olav of Norway during a royal visit. Photo: Unknown

. Merry Christmas
Santa Claus rides up the High Street on a horse and carriage to the City Chambers, laden with toys and gifts, in December 1957 Photo: Unknown

. Peace and love
Ban the Bomb marchers are pictured on the High Street, led by Mr D'Arcy and Miss Ann Hutchison, as part of Edinburgh Council for Nuclear Disarmament (CND) in November 1961. Photo: Unknown

1. Merry Christmas
Santa Claus rides up the High Street on a horse and carriage to the City Chambers, laden with toys and gifts, in December 1957 Photo: Unknown

2. Peace and love
Ban the Bomb marchers are pictured on the High Street, led by Mr D'Arcy and Miss Ann Hutchison, as part of Edinburgh Council for Nuclear Disarmament (CND) in November 1961. Photo: Unknown

3. Last orders
This picture of St Giles' Cathedral was taken in April 1950 and shows buildings that were later demolished, including the Black Swan pub. Photo: JPI Media

4. A royal affair
The Royal Mile has lived up to its name - with a number of regal processions taking place on its cobbles over the years. The Scots Greys are pictured marching up the street in honour of Queen Elizabeth II and Prince Philip Duke of Edinburgh's visit during their tour of Scotland in July 1956. Photo: Unknown