Edinburgh Old Town has preserved much of its medieval street plan and many Reformation-era buildings. The 'Royal Mile' is a name coined in the early 20th-century for the main artery of the Old Town which runs on a downwards slope from Edinburgh Castle to both Holyrood Palace and the ruined Holyrood Abbey. Narrow closes (alleyways), often no more than a few feet wide, lead steeply downhill to both north and south of the main spine which runs west to east.
Notable buildings in the Old Town include St. Giles' Cathedral, the General Assembly Hall of the Church of Scotland, the National Museum of Scotland, the Old College of the University of Edinburgh and the Scottish Parliament Building. The area has a number of underground vaults and hidden passages that are relics of previous phases of construction.
The street layout, typical of the old quarters of many northern European cities, is made especially picturesque in Edinburgh, where the castle perches on top of a rocky crag, the remnants of an extinct volcano, and the main street runs down the crest of a ridge from it. This 'crag and tail' landform was created during the last ice age when receding glaciers scoured across the land pushing soft soil aside but being split by harder crags of volcanic rock. The hilltop crag was the earliest part of the city to develop, becoming fortified and eventually developing into the current Edinburgh Castle. The rest of the city grew slowly down the tail of land from the Castle Rock. This was an easily defended spot with marshland on the south and a man-made loch, the Nor Loch, on the north. Access up the main road to the settlement was therefore restricted by means of various gates and the city walls, of which only fragmentary sections remain.
The original strong linear spine of the Royal Mile only had narrow closes and wynds leading off its sides. These began to be supplemented from the late 18th century with wide new north-south routes, beginning with the North Bridge/South Bridge route, and then George IV Bridge. These rectilinear forms were complemented from the mid 19th century with more serpentine forms, starting with Cockburn Street, laid out by Peddie and Kinnear in 1856, which specifically improved access between the Royal Mile and the newly rebuilt Waverley Station.
Edinburgh Old Town is part of UNESCO World Heritage Site of The Old and New Towns of Edinburgh, inscribed by in 1995.
References:The Château du Lude is one of the many great châteaux of the Loire Valley in France. Le Lude is the most northerly château of the Loire Valley and one of the last important historic castles in France, still inhabited by the same family for the last 260 years. The château is testimony to four centuries of French architecture, as a stronghold transformed into an elegant house during the Renaissance and the 18th century. The monument is located in the valley of Le Loir. Its gardens have evolved throughout the centuries.