Husband Adolph de Meyer
14 William St, Belgravia, London SW1X, UK
1 Cadogan Gardens, Chelsea, London SW3 2RJ, Regno Unito
Olga, the Baroness de Meyer (8 August 1871 – 6 January 1931) was a British-born artists' model, socialite, patron of the arts, writer, and fashion figure of the early 20th century. She was best known as the wife of photographer Adolph de Meyer and was rumoured to be the natural or god-daughter of King Edward VII of the United Kingdom. After 1916 she preferred to be known as Mahrah de Meyer.
Of Portuguese, Italian, French, and American descent, she was born Donna Maria Beatrice Olga Alberta Caracciolo in London, England. Her father was Neapolitan nobleman Gennaro Caracciolo Pinelli, Duke Caracciolo (1849–?), eldest son of the 4th Duke of Castelluccio, while her mother was the former Marie Blanche Sampayo (1849–1890), a daughter of Antoine François Oscar Sampayo, a French diplomat who served as that country's minister to Portugal, and his American wife, Virginia Timberlake. Her great-grandmother Margaret O'Neill Eaton was the central figure in the Petticoat affair, a scandal that plagued President Andrew Jackson. Another great-grandparent was a Marshal of France, Count Auguste Regnaud de Saint-Jean d'Angély.
Olga was born at 14 William Street, Lowndes Square, Chelsea, on 8 August 1871 and her father registered the birth in Chelsea North-East Sub-District on 5 September 1871, 'Olga' being the third and 'Alberta' the fifth of her seven fornames. The 1871 Census, taken on 3 April 1871, showed the couple with her mother at Thomas's Hotel and Lord Carrington's diary shows them together at Marlborough House on 4 July 1871 when the Duchess was heavily pregnant and the Duke was unwell. Jane Ridley says that the Duchess 'scandalised London society that winter, going out shooting in a kilt and smoking cigarettes'.. Later gossip purveyed by Jacques Emile Blanche (who knew Olga and her mother at Dieppe in the 1880s) said that the couple had separated 'at the church door' and that Olga was the daughter or god-daughter of the Prince of Wales, later King Edward VII, but Ridley considers it most unlikely that she was his child. As a Catholic Olga was certainly not the Prince's god-daughter. In the 1870s when staying at Sandringham 'an Italian Duchess, who is an Englishwoman, and her daughter, brought up as a Roman Catholic and now turning Protestant', presumably the Duchess and Olga, are mentioned by a visiting bishop. According to the writer Philippe Jullian the Prince believed that Olga was his child and supported her  but others assumed that her mother's friend Stanislaus Augustus, 3rd Prince Poniatowski (1835-1908), a married former equerry of Napoleon III, was her father. Immediately after the death of her mother in 1891, Olga went to Naples and married in 1892, Prince Marino Brancaccio, a member of another Catholic family, but they were divorced at Hamburg in June 1899. When Olga married Adolph de Meyer the following month in London she did so in a Protestant ceremony.
Olga de Meyer attended the King's coronation in Westminster Abbey in 1902 when her presence was described as "conspicuous". According to an article entitled "Coronation of King Edward VII: Splendid Scene in Westminster Abbey", The New York Times, 10 August 1902, Olga sat in the front row of the King's box along with several of his intimate friends, including Mary Cornwallis-West, Minnie Paget and the king's mistress Alice Keppel.
In 1916 Olga de Meyer took the forename Mahrah upon the advice of an astrologer.
Olga Caracciolo was married to:
Among her affairs was one with Winnaretta Singer, Princess (Edmond) de Polignac, a Singer sewing machine heiress and arts patron, in the years 1901–05.
Known for "her elusive combination of childlike innocence and soigné charm" and described as "tall and slender, with Venetian red hair", Olga de Meyer was mmuse and model to many artists, among them Jacques-Émile Blanche, James McNeill Whistler, James Jebusa Shannon, Giovanni Boldini, Walter Sickert, John Singer Sargent, and Paul César Helleu. Another of her artist admirers was Charles Conder, who was infatuated by Olga Caracciolo and painted her portrait; Aubrey Beardsley was part of her youthful circle as well. Olga de Meyer also inspired characters in novels by Elinor Glyn and Ada Leverson.
Of Olga's beauty, British novelist George Moore was unimpressed. As he commented to an admiring artist friend, "By Jove, you're all after the girl, a fine Mélisande for the stage, with her beautiful hair down to her heels. She's paintable, I admit, but as to one's daily use, I should rather have the mother than the child. Too slender for me ... you know my tastes."
She worked briefly as a society columnist for La Galoise, a Paris newspaper, in the 1890s. As Mahrah de Meyer, a name she adopted in 1916, she wrote one novel, the aubiographical Nadine Narska (Wilmarth Publishing, 1916). The New York Times condemned the novel as "morbid, exaggerated, ... [and] guilty of many carelessly written sentences", while The Dial called de Meyer's book "a miscellaneous mixture of paganism, diluted Nietzsche, worldly morals, and the doctrine of reincarnation".
One of de Meyer's short stories, Clothes and Treachery, was made into The Devil's Pass Key,, a 1919 silent movie by director Erich von Stroheim.
KKnown as the "woman [amateur fencing] champion of Europe", Baroness de Meyer competed at tournaments in Europe and the United States in the early 1900s. At the Colony Club in New York City on 6 January 1913, she participated in an exhibition match with California champion fencer Sibyl Marston.
AAn observer wrote, "Nervous, drugged, surrounded by ambiguous friends and accompanied by a too-conspicuous husband, Olga had become frankly spiteful. Her scandal-mongering had eliminated the last of her respectable friends, and people visited her only because they could be sure to find a pipe of opium or a sniff of cocaine."
Olga de Meyer is said to have died of a heart attack in a detoxification clinic in Austria in 1930 or 1931  but she was reported as being at St Moritz with her husband in January 1931  and had died 6 January 1931 and was buried 8 January 1931 at Freiburg, Baden-Wurttemberg, Germany.