Mercier was born in
Berlin, the son of Pierre Mercier (died 1729,
Dresden), a
Huguenot tapestry-worker. He studied painting at the
Akademie der Wissenschaften of Berlin and later under
Antoine Pesne, who had arrived in Berlin in 1710. Later, he travelled in Italy and France before arriving in London—"recommended by the Court at Hannover"—probably in 1716. He married in London in 1719 and lived in
Leicester Fields. He was appointed principal painter and librarian to the
Prince and Princess of Wales at their independent establishment in
Leicester Fields, and while he was in favour he painted various portraits of royalty, and no doubt many of the nobility and gentry. Of the royal portraits, those of the Prince of Wales and of his three sisters, painted in 1728, were all engraved in mezzotint by
John Simon, and that of the three elder children of the Prince of Wales by
John Faber the Younger in 1744. This last (entitled
Playing Soldiers) was a typical piece of Mercier's composition, the children being made the subject of a spirited, if somewhat childish, allegory in their game of play. Prince George is represented with a firelock on his shoulder, teaching a dog his drill, while his little brother and sister are equally occupied in a scene that is aptly used to point a patriotic moral embodied in some verses subjoined to the plate, of which the concluding couplet is as follows: In 1733, Mercier painted a Portrait of 'Frederick, Prince of Wales, playing a violoncello, and his Sisters'. National Portrait Gallery, London. There is an alternative version of the painting in the Royal Collection. In the painting 'The Sense of Hearing', 1744, women are playing violin, violoncello, harpsichord, and flute in the
Yale Center for British Art. Mercier lost favour at Court and was replaced as principal painter to Frederick Prince of Wales by
John Ellys on 7 October 1736. He 'went into the country' in 1736/7 and took rooms in
Covent Garden, London. In 1739 he relocated to
York, where he focused on 'fancy' pictures concerned with domestic virtue and also practised portrait painting for over ten years, before returning to London in July 1751. In 1752, Mercier went to
Portugal at the request of several English merchants along with his family. He did not long remain there, however, but came back to London, where he died in 1760.
John Faber the Younger also engraved six plates of "Rural Life" after Mercier, and several other subjects of his have survived him. In August 2016, Mercier's painting
Portrait of a Lady (1744) was one of the subjects for episode 19 in the 5th series of the
BBC Television series
Fake or Fortune? Mercier's daughter
Charlotte was also an artist in her early life, before turning to a life of dissolution and dying in the
St James Workhouse two years after her father's death. == Gallery ==