Nottingham Castle is a castle in Nottingham, England. It is located in a commanding position on a natural promontory known as "'Castle Rock'", with cliffs 130 feet (40 m) high to the south and west. In the Middle Ages it was a major royal fortress and occasional royal residence. In decline by the 16th century, it was largely demolished in 1649, but sufficient fragments remain to give an impression of the layout of the site. A ducal mansion later occupied the summit of the promontory. This was burnt out by rioters in 1831, and later adapted as an art gallery and museum, which remains in use today.

There is some uncertainty whether a castle existed on the site before the Norman Conquest. If there was it would have been smaller and far less elaborate in design than the one that stood there afterwards, keeping in line with Anglo-Saxon architectural tradition.

The first Norman castle was a wooden structure and of a motte-and-bailey design, and was built in 1067, a year after the Battle of Hastings, on the orders of William the Conqueror. This wooden structure was replaced by a far more defensible stone castle during the reign of Henry II, and was imposing and of a complex architectural design, which eventually comprised an upper bailey at the highest point of the castle rock, a middle bailey to the north which contained the main royal apartments, and a large outer bailey to the east.

Nottingham (ⁱ/ˈnɒtɪŋəm/ NOT-ing-əm) is a city and unitary authority in the East Midlands of England in the ceremonial county of Nottinghamshire and is one of eight members of the English Core Cities Group.

Nottingham is famed for its links with the legend of Robin Hood and, during the Industrial Revolution, obtained worldwide recognition for its lace-making, bicycle and tobacco industries. With origins tracable back to 600 AD, Nottingham was granted its city charter as part of the Diamond Jubilee celebrations of Queen Victoria in 1897 and has since been officially titled the City of Nottingham. The city has historically been nicknamed The Queen of the Midlands, being the smaller yet less industrialised regional neighbour to the Midlands biggest city, Birmingham. Nottingham is considered the primary centre of England's East Midlands region, being home to numerous regional headquarters and media stations including the BBC East Midlands and the Regional Government Office.

Whilst Nottingham has always had a tightly-drawn authority boundary, accounting for its relatively small population of 306,700, Nottingham's Urban Area has a population of approximately 670,000; in the 2001 census, it was the eighth largest urban area in the United Kingdom. Eurostat's concept of the Larger Urban Zone listed the area's population at 825,600 as of 2004.

Robin Hood was a heroic outlaw in English folklore. A highly skilled archer and swordsman, he is known for "robbing from the rich and giving to the poor", assisted by a group of fellow outlaws known as his "Merry Men". Traditionally, Robin Hood and his men are depicted wearing Lincoln green clothes. The origin of the legend is claimed by some to have stemmed from actual outlaws, or from ballads or tales of outlaws.

Robin Hood became a popular folk figure in the medieval period continuing through to modern literature, films and television. In the earliest sources, Robin Hood is a yeoman, but he was often later portrayed as an aristocrat wrongfully dispossessed of his lands and made into an outlaw by an unscrupulous sheriff.

In popular culture, Robin Hood and his band of "merry men" are usually portrayed as living in Sherwood Forest, in Nottinghamshire, where much of the action in the early ballads takes place. So does the very first recorded Robin Hood rhyme, four lines from the early 15th century, beginning: "Robyn hode in scherewode stod." However, the overall picture from the surviving early ballads and other early references suggest that Robin Hood may have been based in the Barnsdale area of what is now South Yorkshire (which borders Nottinghamshire).