Portland stone in the context of "Royal London Fusiliers Monument"

A quarry is a type of open-pit mine in which dimension stone, rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some jurisdictions to manage their safety risks and reduce their environmental impact.

The word quarry can also include the underground quarrying for stone, such as Bath stone.

Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone. It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker, and then grinding the clinker with the addition of several percent (often around 5%) gypsum. Several types of Portland cement are available. The most common, historically called ordinary Portland cement (OPC), is grey, but white Portland cement is also available.

The cement was so named by Joseph Aspdin, who obtained a patent for it in 1824, because, once hardened, it resembled the fine, pale limestone known as Portland stone, quarried from the windswept cliffs of the Isle of Portland in Dorset. Portland stone was prized for centuries in British architecture and used in iconic structures such as St Paul's Cathedral and the British Museum.

The Isle of Portland is a tied island, 6 kilometres (4 mi) long by 2.7 kilometres (1.7 mi) wide, in the English Channel. The southern tip, Portland Bill, lies 8 kilometres (5 mi) south of the resort of Weymouth, forming the southernmost point of the county of Dorset, England. A barrier beach called Chesil Beach joins Portland with mainland England. The A354 road passes down the Portland end of the beach and then over the Fleet Lagoon by bridge to the mainland. The population of Portland is 13,417.

Portland is a central part of the Jurassic Coast, a World Heritage Site on the Dorset and east Devon coast, important for its geology and landforms. Portland stone, a limestone famous for its use in British and world architecture, including St Paul's Cathedral and the United Nations Headquarters, continues to be quarried here.

The Cenotaph is a war memorial on Whitehall in London, England. Designed by Sir Edwin Lutyens, it was unveiled in 1920 as the United Kingdom's national memorial to the dead of Britain and the British Empire of the First World War, was rededicated in 1946 to include those of the Second World War, and has since come to represent the Commonwealth casualties from those and subsequent conflicts. The word cenotaph is derived from Greek, meaning 'empty tomb'. Most of the dead were buried close to where they fell; thus, the Cenotaph symbolises their absence and is a focal point for public mourning. The original temporary Cenotaph was erected in 1919 for a parade celebrating the end of the First World War, at which more than 15,000 servicemen, including French and American soldiers, saluted the monument. More than a million people visited the site within a week of the parade.

Calls for the Cenotaph to be rebuilt in permanent form began almost immediately. After some debate, the government agreed and construction work began in May 1920. Lutyens added entasis (curvature) but otherwise made minimal design alterations. The Cenotaph is built from Portland stone. It takes the form of a tomb chest atop a rectangular pylon, which diminishes as it rises. Three flags hang from each of the long sides. The memorial is austere, containing almost no decoration. The permanent Cenotaph was unveiled by King George V on 11 November 1920 in a ceremony combined with the repatriation of the Unknown Warrior, an unidentified British serviceman to be interred in Westminster Abbey. After the unveiling, millions more people visited the Cenotaph and the Unknown Warrior. The memorial met with public acclaim and has largely been praised by academics, though some Christian organisations disapproved of its lack of overt religious symbolism.

The Banqueting House, on Whitehall in the City of Westminster, central London, is the grandest and best-known survivor of the architectural genre of banqueting houses, constructed for elaborate entertaining. It is the only large surviving component of the Palace of Whitehall, the residence of English monarchs from 1530 to 1698. The building is important in the history of English architecture as the first structure to be completed in the classical style of Palladian architecture which was to transform English architecture.

Begun in 1619 and designed by Inigo Jones in a style influenced by Andrea Palladio, the Banqueting House was completed in 1622 at a cost of £15,618, 27 years before Charles I was beheaded on a scaffold in front of it in January 1649. In the 1630s, paintings by Peter Paul Rubens were added to the interior ceiling. The building was controversially re-faced in Portland stone in the 19th century, though the details of the original façade were faithfully preserved. Today, the Banqueting House is a national monument, open to the public and preserved as a Grade I listed building. It is cared for by an independent charity, Historic Royal Palaces, which receives no funding from the British Government or the Crown.