Townhouse (Great Britain) in the context of "Lancaster House"

Hôtel particulier (French: [otɛl paʁtikylje] ) is the French term for a grand urban mansion, comparable to a British townhouse. Whereas an ordinary maison (house) was built as part of a row, sharing party walls with the houses on either side and directly fronting on a street, an hôtel particulier was often free-standing and, by the 18th century, would always be located entre cour et jardin – between the cour d'honneur (an entrance court) and the garden behind. There are hôtels particuliers in many large cities in France.

A townhouse, townhome, town house, or town home is a type of terraced housing. A modern townhouse is often one with multiple floors on a small footprint. In older British usage, the term originally referred to any type of city residence (normally in London) of someone whose main or largest residence was a country house.

An English country house is a large house or mansion in the English countryside. Such houses were often owned by individuals who also owned a town house. This allowed them to spend time in the country and in the city—hence, for these people, the term distinguished between town and country.

However, many were, and often still are, the full-time residence for the landed gentry who dominated rural England until the Reform Act 1832. Frequently, the formal business of the counties was transacted in these country houses, having functional antecedents in manor houses.

Buckingham Palace (UK: /ˈbʌkɪŋəm/) is a royal residence in London, and the administrative headquarters of the monarch of the United Kingdom. Located in the City of Westminster, the palace is often at the centre of state occasions and royal hospitality. It has been a focal point for the British people at times of national rejoicing and mourning.

Originally known as Buckingham House, the building at the core of today's palace was a large townhouse built for the Duke of Buckingham and Normanby in 1703 on a site that had been in private ownership for at least 150 years. It was acquired by George III in 1761 as a private residence for Queen Charlotte and became known as The Queen's House. During the 19th century it was enlarged by architects John Nash and Edward Blore, who constructed three wings around a central courtyard. Buckingham Palace became the London residence of the British monarch on the accession of Queen Victoria in 1837.

Regent's Park (officially The Regent's Park) is one of the Royal Parks of London. It occupies 410 acres (170 ha) in north-west Inner London, administratively split between the City of Westminster and the Borough of Camden (and historically between Marylebone and Saint Pancras parishes). In addition to its large central parkland and ornamental lake, it contains various structures and organizations both public and private, generally on its periphery, including Regent's University and London Zoo.

What is now Regent's Park came into possession of the Crown upon the dissolution of the monasteries in the 1500s, and was used for hunting and tenant farming. In the 1810s, the Prince Regent proposed turning it into a pleasure garden. The park was designed by John Nash and James and Decimus Burton. Its construction was financed privately by James Burton after the Crown Estate rescinded its pledge to do so, and included development on the periphery of townhouses and expensive terrace dwellings. The park is Grade I listed on the Register of Historic Parks and Gardens.

The Savoy Palace, considered the grandest nobleman's townhouse of medieval London, was the residence of prince John of Gaunt until it was destroyed during rioting in the Peasants' Revolt of 1381. The palace was on the site of an estate given to Peter II, Count of Savoy, in the mid-13th century, which in the following century came to be controlled by Gaunt's family and then the monarch by right of the Duchy of Lancaster. It was situated between the Strand and the River Thames. French monarch John II of France died here during his "honourable captivity", after an illness. In the locality of the palace, the administration of law was by a special jurisdiction, separate from the rest of the county of Middlesex, known as the Liberty of the Savoy.

The Tudor-era Savoy Chapel is located on the site of the former palace and has carried on the name. The name is also carried on by the Savoy Theatre and Savoy Hotel also located on the former estate.