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Colnaghi is an
art dealer An art dealer is a person or company that buys and sells works of art, or acts as the intermediary between the buyers and sellers of art. An art dealer in contemporary art typically seeks out various artists to represent, and builds relationsh ...
ship in
St James's St James's is a district of Westminster, and a central district in the City of Westminster, London, forming part of the West End of London, West End. The area was once part of the northwestern gardens and parks of St. James's Palace and much of ...
, central
London London is the Capital city, capital and List of urban areas in the United Kingdom, largest city of both England and the United Kingdom, with a population of in . London metropolitan area, Its wider metropolitan area is the largest in Wester ...
,
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
, which is the oldest commercial art gallery in the world, having been established in 1760.


Foundation

The business that became the Colnaghi gallery was established by
Italian Italian(s) may refer to: * Anything of, from, or related to the people of Italy over the centuries ** Italians, a Romance ethnic group related to or simply a citizen of the Italian Republic or Italian Kingdom ** Italian language, a Romance languag ...
firework manufacturer, Giovanni Battista Torre, in
Paris Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
, France, in 1760. Torre opened a shop with the name "Cabinet de Physique Expérimentale", where he sold scientific instruments, books and prints. In 1767, Torre's son Anthony Torre moved to London where he opened a sister shop, specialising in prints, in partnership with another Italian immigrant, Anthony Molteno. Giovanni Torre died in 1780, and in 1784 Anthony Torre hired Paul Colnaghi—newly arrived in Paris from Milan—to manage a new shop in Palais Royal, Paris.


Paul Colnaghi (1751-1833)

Paul Colnaghi was born in 1751 as Paolo Colnago, in the Brianza region of northern Italy. He was the younger child of the influential Milanese lawyer Dr Martino Colnago and Ippolita Colnaga (née Raggi). He arrived in Paris after his father's death in 1783, where he initially worked for a Milanese optician named Ciceri, before Ciceri recommended Colnaghi's services to his friend Anthony Torre. Paul Colnaghi served as Torre's Paris agent (1784-7), mainly selling prints from England, but he left Paris for London in May 1785. Arriving in London, Colnaghi joined Torre and Molteno, who had become successful selling prints by leading engravers such as William Wynne Ryland and
Valentine Green Valentine Green (3 October 173929 July 1813) was a British mezzotint, mezzotinter and print publisher. Green trained under Robert Hancock (engraver), Robert Hancock, a Worcester, England, Worcester engraver, after which he moved to London and be ...
. The London business moved to 132 Pall Mall in 1786 and Colnaghi married Anthony Torre's sister-in-law Elizabeth Baker. Anthony Torre retired to Italy in 1788, and Molteno took over as senior partner. The firm operated as ''Molteno, Colnaghi & Co.'' Colnaghi now ran the original firm with a succession of partners, concentrating on selling new prints and engravings of
Old Master In art history, "Old Master" (or "old master")Old Masters De ...
paintings. He published a very popular series of engravings, the '' Cries of London'', from 1792 to 1797. He also moved premises to 23 Cockspur Street in 1799, and survived the disruption to his trade caused by the
Napoleonic Wars {{Infobox military conflict , conflict = Napoleonic Wars , partof = the French Revolutionary and Napoleonic Wars , image = Napoleonic Wars (revision).jpg , caption = Left to right, top to bottom:Battl ...
. Paul Colnaghi's elder son Dominic Charles (sometimes also given as Dominic Paul) became a partner in around 1810, and later his younger son Martin also became a partner. The firm held monthly levées at its premises for its customers, many from the British aristocracy. Colnaghi became the official print-seller to the
Prince Regent A prince regent or princess regent is a prince or princess who, due to their position in the line of succession, rules a monarchy as regent in the stead of a monarch, e.g., as a result of the sovereign's incapacity (minority or illness) or ab ...
, and he was asked to organise the
Royal Collection The Royal Collection of the British royal family is the largest private art collection in the world. Spread among 13 occupied and historic List of British royal residences, royal residences in the United Kingdom, the collection is owned by King ...
, receiving a Royal Warrant when the Prince Regent became George IV. Colnaghi was also print-seller to George's sister,
Charlotte, Princess Royal Charlotte, Princess Royal (Charlotte Augusta Matilda; 29 September 1766 – 6 October 1828), was Queen of Württemberg as the wife of King Frederick I. She was the eldest daughter and fourth child of George III of the United Kingdom and his wi ...
, later Queen of Württemberg. Colnaghi's impending retirement to Italy was postponed when his son Martin sued both his father and his brother Dominic in 1824. The settlement of the lawsuit left Martin with the old shop. Martin became bankrupt in 1832 and 1843, and died in 1851, but his son
Martin Henry Colnaghi Martin Henry Colnaghi (16 November 1821 – 27 June 1908) was a British art dealer for the London-based Colnaghi. Personal life He was born on 16 November 1821 at 23 Cockspur Street, London, and baptised Martino Enrico Luigi Gaetano. He was the ...
, continued the separate business in Pall Mall. Paul and Dominic Colnaghi moved to 14 Pall Mall East—near the nascent
National Gallery The National Gallery is an art museum in Trafalgar Square in the City of Westminster, in Central London, England. Founded in 1824, it houses a collection of more than 2,300 paintings dating from the mid-13th century to 1900. The current di ...
. Dominic married Katherine Pontet (d.1881) on 15 October 1831, and settled at 62 Margaret street, Cavendish square. Paul Colnaghi continued to work in the business until he died at his home at St George's Place Hanover Square, on 26 August 1833.


Dominic Colnaghi (1790–1879) and John Scott (d.1864)

Caroline Scott's son, John Anthony Scott, joined his cousin Dominic Colnaghi in the business in 1839. Scott commissioned William Simpson to go to the Crimea in 1854 to make watercolour sketches of scenes from the
Crimean War The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
, published as a series of 81 lithographs in ''
The Seat of War in the East ''The'' is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The ...
''. The gallery also sold photographs by
Roger Fenton Roger Fenton (28 March 1819 – 8 August 1869) was a British photographer, noted as one of the first war photographers. Fenton was born into a Lancashire merchant family. After graduating from London with an arts degree, he became interested i ...
. After this early experience with photography, the gallery commissioned
Leonida Caldesi Leonida is a given name and a surname which may refer to: * Leonida Bagration of Mukhrani (1914–2010), wife of Vladimir Kirillovich, Grand Duke of Russia, a pretender to the Russian throne * Leonida Barboni (1909–1970), Italian film cinemato ...
and
Mattia Montecchi Mattia is an Italian masculine given name and surname, a version of Matteo, which means "gift of God". Notable people with the name include: Given name * Mattia Altobelli (footballer, born 1983), Italian footballer * Mattia Altobelli (football ...
to take photographs at the
Art Treasures Exhibition The Art Treasures of Great Britain was an exhibition of fine art held in Manchester, England, from 5 May to 17 October 1857.Julia Margaret Cameron Julia Margaret Cameron (; 11 June 1815 – 26 January 1879) was an English photographer who is considered one of the most important portraitists of the 19th century. She is known for her Soft focus, soft-focus close-ups of famous Victorian era, ...
from 1864. The firm was associated with
John Constable John Constable (; 11 June 1776 – 31 March 1837) was an English landscape painter in the Romanticism, Romantic tradition. Born in Suffolk, he is known principally for revolutionising the genre of landscape painting with his pictures of Dedha ...
, assisting him to exhibit ''
The Hay Wain ''The Hay Wain'' – originally titled ''Landscape: Noon'' – is a painting by John Constable, completed in 1821, which depicts a rural scene on the River Stour, Suffolk, River Stour between the English counties of Suffolk and Essex. It hangs ...
'' at the Paris Salon of 1824, where it won a gold medal. The art dealership organised exhibitions for the
British Institution The British Institution (in full, the British Institution for Promoting the Fine Arts in the United Kingdom; founded 1805, disbanded 1867) was a private 19th-century society in London formed to exhibit the works of living and dead artists; it ...
, and of paintings by
Eugène Delacroix Ferdinand Victor Eugène Delacroix ( ; ; 26 April 1798 – 13 August 1863) was a French people, French Romanticism, Romantic artist who was regarded as the leader of the French Romantic school.Noon, Patrick, et al., ''Crossing the Channel: ...
in 1829. After Scott died in 1864, and Dominic Colnaghi retired in 1865, Scott's cousin Andrew McKay (d. 1899) became sole proprietor. He was joined by his son William KcKay in 1879. "Old Dom" Colnaghi died the same year, on 19 December, and was buried in Brompton cemetery. He was survived by his wife Katherine (also spelled Catherine) and by his two sons.


Old Master art dealer

When Andrew McKay retired in 1894, William McKay was joined in partnership by Edmund Deprez and Otto Gutekunst (1865–1947). Gutekunst was the son of Heinrich Gottlob Gutekunst, who managed the London branch of Paris art dealer Goupil & Cie in the 1860s. From the early 1860s he was working in the firm's London branch then managed by . The change of partners led to a significant change in the focus of the dealership. Colnaghi had been known primarily as a print-seller in the 19th century, but the firm started to gain a reputation as a dealer of Old Master paintings. The sale of original Old Master works accelerated for a number of reasons: the Settled Land Act 1882 allowed the breaking of
entail In English common law, fee tail or entail is a form of trust, established by deed or settlement, that restricts the sale or inheritance of an estate in real property and prevents that property from being sold, devised by will, or otherwise ali ...
ed estates, allowing sales of aristocratic collections; the need to pay
death duties International tax law distinguishes between an estate tax and an inheritance tax. An inheritance tax is a tax paid by a person who inherits money or property of a person who has died, whereas an estate tax is a levy on the estate (money and prop ...
, introduced in 1894, spurred the sale of works from the collections of the British aristocracy; and American collectors developed a taste for Old Master works. With American art dealer
Bernard Berenson Bernard Berenson (June 26, 1865 – October 6, 1959) was an American art historian specializing in the Renaissance. His book ''The Drawings of the Florentine Painters'' was an international success. His wife Mary is thought to have had a large ...
, Colnaghi established a collection of Old Master paintings for Isabella Stewart Gardner for her house in Boston, including the '' Rape of Europa'' by
Titian Tiziano Vecellio (; 27 August 1576), Latinized as Titianus, hence known in English as Titian ( ), was an Italian Renaissance painter, the most important artist of Renaissance Venetian painting. He was born in Pieve di Cadore, near Belluno. Ti ...
, acquired from
Lord Darnley Lord Darnley is a noble title associated with a Scottish Lordship of Parliament, first created in 1356 for the family of Stewart of Darnley and tracing a descent to the Dukedom of Richmond in England. The title's name refers to Darnley in Scot ...
in 1896. The firm sold two paintings from the collection of Prince Mario Chigi Albani della Rovere
Botticelli Alessandro di Mariano di Vanni Filipepi ( – May 17, 1510), better known as Sandro Botticelli ( ; ) or simply known as Botticelli, was an Italian painter of the Early Renaissance. Botticelli's posthumous reputation suffered until the late 1 ...
's '' Madonna of the Eucharist'' and Titian's '' Portrait of Pietro Aretino''—to
Henry Clay Frick Henry Clay Frick (December 19, 1849 – December 2, 1919) was an American industrialist, financier, and art patron. He founded the H. C. Frick & Company coke manufacturing company, was chairman of the Carnegie Steel Company and played a major ...
, now in the
Frick Collection The Frick Collection (colloquially known as the Frick) is an art museum on the Upper East Side of Manhattan in New York City. It was established in 1935 to preserve the collection of the industrialist Henry Clay Frick. The collection (museum) ...
, although the sale of Italian paintings dried up after Prince Chigi was prosecuted under a new Italia law prohibiting the export of pictures. The new law also prevented the sale of Titian's '' Sacred and Profane Love'' from the Borghese collection. Berenson was offered a partnership by Colnaghi in 1901, but decided not to accept the offer and later signed a partnership agreement with Colnaghi's arch-rival,
Joseph Duveen Joseph Duveen, 1st Baron Duveen (14 October 1869 – 25 May 1939), known as Sir Joseph Duveen, Baronet, between 1927 and 1933, was a British art dealer who was considered one of the most influential art dealers of all time. Life and career Jo ...
. Colnaghi hired instead Charlie Carstairs of
New York New York most commonly refers to: * New York (state), a state in the northeastern United States * New York City, the most populous city in the United States, located in the state of New York New York may also refer to: Places United Kingdom * ...
gallery Knoedler instead. Colnaghi developed a fruitful relationship with Knoedler, with Colnaghi finding suitable paintings in
Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...
for Knoedler to sell to wealthy collectors in the United States, including
Andrew Mellon Andrew William Mellon (; March 24, 1855 – August 26, 1937), known also as A. W. Mellon, was an American banker, businessman, industrialist, philanthropist, art collector, and politician. The son of Mellon family patriarch Thomas Mellon ...
. Through Knoedler, Colnaghi sold to Mellon a
Rembrandt Rembrandt Harmenszoon van Rijn (; ; 15 July 1606 – 4 October 1669), mononymously known as Rembrandt was a Dutch Golden Age painter, printmaker, and Drawing, draughtsman. He is generally considered one of the greatest visual artists in ...
Self-portrait that Gutekunst had acquired from the
Duke of Buccleuch Duke of Buccleuch ( ), formerly also spelt Duke of Buccleugh, is a title in the Peerage of Scotland created twice on 20 April 1663, first for James Scott, 1st Duke of Monmouth, and second ''suo jure'' for his wife Anne Scott, 4th Countess of ...
, and
Holbein Holbein may refer to: *Holbein (surname) *Holbein, Saskatchewan, a small village in Canada *Holbein carpet, a type of Ottoman carpet *Holbein stitch, a type of embroidery stitch * Holbein (crater), a crater on Mercury {{Disambig ...
's '' Portrait of Edward VI''. Colnaghi negotiated the sale of Lord Ashburnham's Botticelli, '' The Death of Lucretia'' to Isabella Stewart Gardner, and also the sale of
Rembrandt Rembrandt Harmenszoon van Rijn (; ; 15 July 1606 – 4 October 1669), mononymously known as Rembrandt was a Dutch Golden Age painter, printmaker, and Drawing, draughtsman. He is generally considered one of the greatest visual artists in ...
's '' Preacher Anslo and his wife''. Colnaghi worked with Max J. Friedländer and Wilhelm von Bode on the acquisition of a selection of paintings from the Hope Collection for the
Berlin State Museums The Staatliche Museen zu Berlin (Berlin State Museums) are a group of institutions in Berlin, Germany, comprising seventeen museums in five clusters; several research institutes; libraries; and supporting facilities. They are overseen by the ...
. Colnaghi sold Holbein's ''
Christina of Denmark, Duchess of Milan Christina may refer to: People * Christina (given name), shared by several people * Christina (surname), shared by several people Places * Christina, Montana, unincorporated community, United States * Christina, British Columbia, Canada * Christ ...
'' to the
National Gallery The National Gallery is an art museum in Trafalgar Square in the City of Westminster, in Central London, England. Founded in 1824, it houses a collection of more than 2,300 paintings dating from the mid-13th century to 1900. The current di ...
for a record price of £61,000, acquired from the collection of the
Duke of Norfolk Duke of Norfolk is a title in the peerage of England. The premier non-royal peer, the Duke of Norfolk is additionally the premier duke and earl in the English peerage. The seat of the Duke of Norfolk is Arundel Castle in Sussex, although the t ...
. Deprez retired in 1907, and William McKay in 1911. The firm merged with Obach & Co in 1911—Gutekunst having married Charles Obach's daughter Lena in 1882—and
Gustavus Mayer Gustavus may refer to: *Gustavus, Alaska, a small community located on the edge of Glacier Bay National Park and Preserve *Gustavus Adolphus College, a private liberal arts college in southern Minnesota *Gustavus (name), a given name **Gustavus, the ...
, formerly manager of Obach in New Bond Street, joined as Colnaghi as a partner, with the firm renamed P. & D. Colnaghi and Obach. The firm moved to a new building in New Bond Street in 1912, but returned to the name P. and D. Colnaghi and Company in 1914 (perhaps due to popular sentiment against German-sounding names at the beginning of the First World War).


Hermitage sales

Colnaghi was involved in the secret sales by the Soviet government of works from the Russian Imperial collection in the Hermitage in the 1920s and 1930s, along with Knoedler and Matthiesen in Berlin.
Calouste Gulbenkian Calouste Sarkis Gulbenkian (; ; 23 March 1869 – 20 July 1955) was an Ottoman-born British Armenian businessman and philanthropist. He played a major role in making the petroleum reserves of the Middle East available to Western development a ...
had bought four sets of works from the Russian government in 1928 to 1930, most now held by the
Calouste Gulbenkian Museum The Calouste Gulbenkian Museum houses one of the world's most important private art collections. It includes works from Ancient Egypt to the early 20th century, spanning the arts of the Islamic art, Islamic World, China and Japan, as well as the F ...
in Lisbon. Colnaghi, Knoedler and Matthiesen assisted Paul Mellon to acquire many Russian works, including
van Dyck Sir Anthony van Dyck (; ; 22 March 1599 – 9 December 1641) was a Flemish Baroque artist who became the leading court painter in England after success in the Spanish Netherlands and Italy. The seventh child of Frans van Dyck, a wealt ...
's '' Portrait of Philip, 4th Lord Wharton'',
Jan van Eyck Jan van Eyck ( ; ; – 9 July 1441) was a Flemish people, Flemish painter active in Bruges who was one of the early innovators of what became known as Early Netherlandish painting, and one of the most significant representatives of Early Nort ...
's ''
Annunciation The Annunciation (; ; also referred to as the Annunciation to the Blessed Virgin Mary, the Annunciation of Our Lady, or the Annunciation of the Lord; ) is, according to the Gospel of Luke, the announcement made by the archangel Gabriel to Ma ...
'',
Botticelli Alessandro di Mariano di Vanni Filipepi ( – May 17, 1510), better known as Sandro Botticelli ( ; ) or simply known as Botticelli, was an Italian painter of the Early Renaissance. Botticelli's posthumous reputation suffered until the late 1 ...
's ''
Adoration of the Magi The Adoration of the Magi or Adoration of the Kings or Visitation of the Wise Men is the name traditionally given to the subject in the Nativity of Jesus in art in which the three Magi, represented as kings, especially in the West, having fo ...
'',
Perugino Pietro Perugino ( ; ; born Pietro Vannucci or Pietro Vanucci; – 1523), an Italian Renaissance painter of the Umbrian school, developed some of the qualities that found classic expression in the High Renaissance. Raphael became his most famous ...
's ''
Crucifixion Crucifixion is a method of capital punishment in which the condemned is tied or nailed to a large wooden cross, beam or stake and left to hang until eventual death. It was used as a punishment by the Achaemenid Empire, Persians, Ancient Carthag ...
'',
Raphael Raffaello Sanzio da Urbino (; March 28 or April 6, 1483April 6, 1520), now generally known in English as Raphael ( , ), was an Italian painter and architect of the High Renaissance. List of paintings by Raphael, His work is admired for its cl ...
's ''
Saint George and the Dragon In a legend, Saint Georgea soldier venerated in Christianity—defeats a dragon. The story goes that the dragon originally extorted tribute from villagers. When they ran out of livestock and trinkets for the dragon, they started giving up a huma ...
'' and '' Alba Madonna'', Titian's '' Venus with a Mirror'', and other works by Rembrandt and van Dyck. Mellon later donated his collection to the
National Gallery of Art The National Gallery of Art is an art museum in Washington, D.C., United States, located on the National Mall, between 3rd and 9th Streets, at Constitution Avenue NW. Open to the public and free of charge, the museum was privately established in ...
in Washington, DC.


Recent history

In 1937, the firm became a limited company, with three directors: Otto Gutekunst, Gustavus Mayer, and James Byam Shaw. Gutekunst retired in 1939 and died in 1947; Mayer died in 1954. Meanwhile, Harold Wright and Tom Baskett became directors in 1939, and Roderic Thesiger in 1955. Colnaghi moved from New Bond Street to Old Bond Street in 1940, to share space with Knoedler. The Old Master Drawings department became pre-eminent under the leadership of James Byam Shaw, and Byam Shaw largely determined the direction of the firm after Mayer's death in 1954 until his own retirement in 1968. The gallery was involved in the sale of an outstanding collection of prints by the
Prince of Liechtenstein The monarchy of Liechtenstein is the constitutional form of government by which a hereditary sovereign reigns as the head of state of Liechtenstein. The current monarch is Prince Hans-Adam II. The House of Liechtenstein, after which the sove ...
. As Thesiger also wished to retire, and John Baskett wanted to start his own business, Jacob Rothschild bought the company in 1970. He sold Colnaghi to the Oetker Group in 1981, owned by a Colnaghi client Rudolf Oetker. Under Richard Knight, Colnaghi expanded in the buoyant art market of the 1980s, opening a gallery in New York in 1983. Changing market conditions led to the closure of the print and watercolour departments in 1989, followed by the closure of Paris gallery and then Colnaghi New York in 1996. In 2001, the Oetker Group sold Colnaghi to Konrad Bernheimer, owner of Bernheimer Fine Old Masters in
Munich Munich is the capital and most populous city of Bavaria, Germany. As of 30 November 2024, its population was 1,604,384, making it the third-largest city in Germany after Berlin and Hamburg. Munich is the largest city in Germany that is no ...
. Colnaghi was merged with the gallery of Katrin Bellinger who took charge of Colnaghi's drawings department. Since 2015, the CEO has been Jorge Coll. He acquired Colnaghi from Konrad Bernheimer, who had retired as chairman. Colnaghi then moved into a custom-built gallery in
St James's St James's is a district of Westminster, and a central district in the City of Westminster, London, forming part of the West End of London, West End. The area was once part of the northwestern gardens and parks of St. James's Palace and much of ...
in London where they show European Old Master paintings and sculpture, and art from the Spanish-speaking world. In 2017, Colnaghi opened a gallery in New York led by Carlos A. Picón, formerly curator of Greek and Roman Art at The Metropolitan Museum of Art, expanding their offering to include art of the ancient world. Victoria Golembiovskaya, the founder of an art consultancy called House of the Nobleman, joined the firm in 2019 as Coll's co-CEO to establish Colnaghi’s first modern and contemporary department and left at the end of 2021 to set up her own independent agency. Jorge Coll remains the main dealer and shareholder of Colnaghi.


Archives

Colnaghi includes a 225-foot archive of important art dealers records, currently stored outside London at the Windmill Hill Archives,
Waddesdon Manor Waddesdon Manor is a English country house, country house in the village of Waddesdon, in Buckinghamshire, England. Owned by the National Trust and managed by the Rothschild Foundation, it is one of the National Trust's most visited properties, ...
. In 2002, Katrin Bellinger Henkel and Konrad Bernheimer bought them from Christoph Graf Douglas, the former head of Sotheby's in Germany and the son-in-law of
Rudolf August Oetker Rudolf August Oetker (20 September 1916 – 16 January 2007) colloquially also R.A. Oetker was a German industrialist, businessman, ship owner and philanthropist. Most notably he turned Dr. Oetker, founded by his grandfather August Oetker, int ...
, whose company owned Colnaghi and its archives between 1981 and 2001. Since then, the ownership of the Colnaghi Library and Archives has been held by Colnaghi Holding Ltd.


References


External links

*
History
Colnaghi website
P. & D. Colnaghi & Co.
Frick Collection The Frick Collection (colloquially known as the Frick) is an art museum on the Upper East Side of Manhattan in New York City. It was established in 1935 to preserve the collection of the industrialist Henry Clay Frick. The collection (museum) ...

Colnaghi
British Museum The British Museum is a Museum, public museum dedicated to human history, art and culture located in the Bloomsbury area of London. Its permanent collection of eight million works is the largest in the world. It documents the story of human cu ...
{{DEFAULTSORT:P. and D. Colnaghi and Co. 1760 establishments in France Companies established in 1760 Art galleries in London Companies based in the City of Westminster Buildings and structures in Mayfair Art dealers from London British companies established in 1786 French companies established in 1760