​Catharina "Toto" Koopman (28 October 1908 – 27 August 1991) was a Dutch-Javanese model who worked in Paris prior to World War II. During that war she served as a spy for the Italian Resistance and was captured and held prisoner in the Ravensbrück concentration camp. She later helped establish the Hanover Gallery as one of the most influential art galleries in Europe in the 1950s.

​Born in Java in 1908, ​Catharina Koopman was the daughter of the Dutch cavalry officer Jan George Koopman and Catharina Johanna Westrik, of Dutch and Javanese descent. She was named Catharina, but came to prefer Toto, her childhood nickname after her father's favourite horse. Her only sibling, Henry, nicknamed Ody Koopman (1902–1949), became a successful tennis player.

Toto Koopman left Java in 1920 to attend a boarding school in the Netherlands where she developed a talent for languages and became fluent in English, French, German and Italian. After a year at an English finishing school, she moved to Paris to work as a model.

In Paris, Koopman worked as a house model for Coco Chanel but quit after only six months. She also worked for the designers Rochas, Mainbocher and Madeleine Vionnet, appeared regularly in Vogue Paris and was photographed by Edward Steichen, Cecil Beaton, Horst P. Horst and George Hoyningen-Huene. Her most famous photo, was one that taken by George Hoymingen-Huene with her modeling an Augusta Bernard evening dress with very low back.

Koopman had a small part in the film The Private Life of Don Juan and although this was cut from the final production she still attended the film's premiere with Tallulah Bankhead, who introduced her to Max Aitken, 1st Baron Beaverbrook, generally known as Lord Beaverbrook.

In 1939 Toto ​Koopman left London to live in Italy. There she began a relationship with a leader of the anti-Mussolini resistance. When World War II broke out, she agreed to use her contacts and language skills to spy for the Italian Resistance. She infiltrated meetings of the Black Shirts but was captured. After spells in prisons in Milan and Lazio she was sent to the Massa Martina detention camp but escaped and hid in the mountains around Perugia, where she worked with a local resistance group. She was recaptured, promptly escaped again, and made her way to Venice. There, in October 1944, Koopman was caught spying on high-ranking German officers in the Danieli Hotel and quickly deported to the Ravensbrück concentration camp. Very shortly before the camp was liberated in April 1945, the Nazi authorities released several hundred prisoners, including Koopman, to the care of the Red Cross in Sweden. Randolph Churchill, the son of Winston Churchill, one of Toto ​Koopman's former boyfriends, went to Gothenburg and helped the emaciated Koopman obtain new clothes, a new passport and a wig for her shaved head.

​While recuperating in Ascona in 1945, Koopman met the art dealer Erica Brausen who would become the love of her life. The two became lovers and would remain together for the rest of their lives.

Brausen wanted to open her own commercial gallery in London, so Koopman helped her. They went to London and opened theHanover Gallery. There they hosted shows by the then still new artists like Francis Bacon, Lucian Freud, Marel Duchamp and Henry Moore, in particular Francis Bacon, with whom Brausen was obssessed.

In due course the Hanover Gallery became one of the most influential galleries in Europe, which was noted both for the artists it featured and the unusual two women who owned it.

During the 1950s Koopman studied at the University of London and took part in several archaeological excavations. She made a donation of books to the Institute of Archaeology in London.

​In 1959 Koopman and Brausen bought a property on the island of Panarea where they built six villas amongst extensive gardens and entertained very lavishly.

Cléopâtre-Diane de Merode, dite Cléo de Mérode, est une danseuse, modèle et icône de beauté française née le 27 septembre 1875 dans le 5e arrondissement de Paris et morte le 17 octobre 1966 dans le 8e arrondissement de la même ville.

Although a successful dance of her epoque, Cléo de Mérode was known by her extraordinary beauty. She was courted by countless men, many of them famous, including King Léopold II of the Belgians. 

Various artists of her time were also inspired by her beauty, and she had posed for the sculptor Alexandre Falguière, the painters Edgar Degas, Jean-Louis Forain, Giovanni Boldini, Henri de Toulouse-Lautrec, etc. ​

But hard as she tried defending herself, Cléo de Mérode's fame was tinted, worsened by the rumor that she was the lover of King Léopold II of the Belgians. And she would have to fight for her reputation for the rest of her life.

In 1949, the French philosopher Simone de Beauvoir mentioned Cléo de Mérode as a "Cocotte"(a woman of certain reputation) in her book Le Deuxième Sexe (The Second Sex). Cléo de Mérode filed a lawsuit against the philosopher reclaiming millions of francs. She won the lawsuit the second year with a symbolic one franc.

But her reputation was not completed saved. Even as late as 2015, long after her death, Cléo de Mérode was included in an exposition of the prostitution of Belle Époque at musée d'Orsay.

In 1955, she published her autobiography, titled Le Ballet de ma vie(The Ballet of My Life), in which she revealed her real relations with King Léopold II of the Belgians.

Cléo de Mérode died on 17 October 1966 at her home in Paris, at the age of 91.

Malgré une rentrée réussie en 1924, elle décide de se retirer du monde de la danse à Paris. Sur la demande d'Henri Varna et Émile Audiffred, elle reparaît ponctuellement sur scène en juin 1934 dans La revue 1900 aux côtés du danseur George Skibine. « Je portais une robe de satin rose, baleinée à la taille, très longue, avec un ruché dans le bas. Nous dansions cinq valses à la file ; nous finissions par un grand tourbillon, et Skibine m'emportait dans ses bras au fond de la scène ».

Sa beauté délicate, hors des canons de beauté 1900, est restée légendaire, ainsi que les hommages qu'elle reçoit de quelques célèbres soupirants, plus particulièrement le roi Léopold II de Belgique, aventures qu'elle relate dans ses mémoires, Le Ballet de ma vie, publiées en 1955 par les Éditions Horay, à Paris. La rumeur infondée de leur liaison et, par conséquent de son influence sur la politique belge et congolaise, a cependant nui à sa réputation.

​Elle pose pour le sculpteur Alexandre Falguière, pour les peintres Edgar Degas, Jean-Louis Forain, Giovanni Boldini, elle est représentée par Henri de Toulouse-Lautrec, par le verrier capitaine d’industries et artiste Georges Despret, et a son effigie en cire au musée Grévin dès 1895, façonnée par le chef d'atelier du musée, le sculpteur Léopold Bernstamm.

Elle est une des premières femmes dont l’image photographique, due notamment aux photographes Paul Nadar (1856-1939), fils et successeur de Félix Nadar, et surtout Léopold-Émile Reutlinger (1863-1937), est diffusée à l'échelle mondiale. Elle pose également pour l'atelier photographique Benque (photographies prises à l'Opéra de Paris, à partir de 1890), le photographe Charles-Pierre Ogerau (1868-1908), auteur d'une série de portraits en 1895, et plus tard, Henri Manuel (1874-1947).

Élue « reine de Beauté » sur photographies par les lecteurs de L'Illustration en 1896, parmi 131 célébrités, dont Sarah Bernhardt ; elle accroît sa notoriété la même année avec un parfum de scandale, du fait de l'exposition de la sculpture La Danseuse d’Alexandre Falguière au Salon des artistes français. 

​En 1950, Cléo de Mérode gagne un procès contre Simone de Beauvoir, qui en 1949 dans Le Deuxième Sexe l'assimilait à une « cocotte », ignorant par ailleurs qu'elle était encore en vie. Le juge considère que l'ancienne danseuse aurait dû publiquement démentir cette rumeur à l'époque mais indique que les propos de la philosophe sont inconvenants et la condamne à faire retirer cette mention de son livre et à un franc symbolique d'amende, alors que Cléo de Mérode réclamait millions. Dans Les femmes, actrices de l'Histoire, l'historienne Yannick Ripa écrit : « Réputée pour sa grande beauté, plus encore que pour ses talents de danseuse, Cléo de Mérode luttera toute sa vie contre sa réputation de demi-mondaine ». La même réputation lui est donnée lors d'une exposition sur la prostitution de la Belle Époque en 2015 au musée d'Orsay.

Pendant l’Occupation, elle se retire à Saint-Gaultier, dans l’Indre. Elle retourne ensuite vivre à Paris. Elle séjourne plusieurs étés de sa vie à Biarritz ou au château de Rastignac à La Bachellerie en Dordogne, chez la famille Lauwick.

En 1955, elle publie son autobiographie, intitulée Le Ballet de ma vie.

Elle meurt à l'âge de 91 ans le 17 octobre 1966, à son domicile parisien situé au 15, rue de Téhéran (8e arrondissement de Paris).

​Consuelo Vanderbilt-Balsan (formerly Consuelo Spencer-Churchill, Duchess of Marlborough; born Consuelo Vanderbilt; 2 March 1877 – 6 December 1964) was a member of the prominent American Vanderbilt family. Her first marriage to the ninth Duke of Marlborough has become a well-known example of one of the advantageous, but loveless, marriages common during the Gilded Age. The Duke obtained a large dowry by the marriage, and reportedly told her just after the marriage that he married her in order to "save Blenheim" Palace, his ancestral home. Consuelo Vanderbilt and her friends were the inspiration for Edith Wharton's unfinished novel The Buccaneers.

Although the teenage Consuelo was opposed to the marriage arranged by her mother, she became a popular and influential Duchess. For much of the marriage, the Marlboroughs lived separately and the marriage was finally annulled. She went on to marry a wealthy French aviator and continued her charitable endeavours.

Born in New York City, Consuelo Vanderbilt was the only daughter and eldest child of William Kissam Vanderbilt, a New York railroad millionaire, and his first wife, a Southern belle Alva Erskine Smith (1853–1933, who later married Oliver Belmont) from Mobile, Alabama,  the daughter of a cotton broker. Her Spanish name was in honor of her godmother, Consuelo Yznaga (1853–1909), a half-Cuban, half-American socialite who created a social stir a year earlier when she married the fortune-hunting George, Viscount Mandeville, a union of Old World aristocracy and New World money that caused the groom's father, the 7th Duke of Manchester, to openly wonder if his son and heir had married a "Red Indian". 

Consuelo Vanderbilt was largely dominated by her mother, who was determined that her daughter would make a great marriage like that of her famous namesake. In her autobiography, Consuelo Vanderbilt described how she was required to wear a steel rod, which ran down her spine and fastened around her waist and over her shoulders, to improve her posture. She was educated entirely at home by governesses and tutors, and learned foreign languages at an early age. Her mother was abusive and whipped her with a riding crop for minor infractions. When, as a teenager, Consuelo objected to the clothing her mother had selected for her, Alva told her that "I do the thinking, you do as you are told."

None of the others, however, was good enough for Alva Vanderbilt, who was​determined to secure the highest-ranking mate possible for her only daughter, a union that would emphasize the preeminence of the Vanderbilt family in New York society.

With the help of Lady Paget, the wife of Sir Arthur Paget, and daughter of an socially ambitious widow of an American hotel entrepreneur, Alva Vanderbilt engineered a meeting between Consuelo and the indebted, titled Charles Spencer-Churchill, 9th Duke of Marlborough, chatelain of Blenheim Palace. 

Lady Paget, always short of money, soon became a sort of international marital agent, introducing eligible American heiresses to British noblemen.

Consuelo Vanderbilt had no interest in the duke, being secretly engaged to an American, Winthrop Rutherfurd. Her mother cajoled, wheedled, begged, and then, ultimately, ordered her daughter to marry Marlborough. When Consuelo – a docile teenager whose only notable characteristic at the time was abject obedience to her fearsome mother – made plans to elope, she was locked in her room as Alva threatened to murder Rutherfurd. Still she refused. It was only when Alva Vanderbilt claimed that her health was being seriously and irretrievably undermined by Consuelo's stubbornness and appeared to be at death's door that the malleable girl acquiesced. Alva made an astonishing recovery from her entirely phantom illness, and when the wedding took place, Consuelo stood at the altar reportedly weeping behind her veil. The duke, for his part, gave up the woman he reportedly loved back in England and collected US$2.5 million (approximately US$75.2 million in 2019 dollars) in railroad stock as a marriage settlement. His purpose of marrying her was to restore his beloved Bleinheim Palace in Oxfordshire.

After her marriage, Consuelo Vanderbilt's father built a mansion for her in London, Sunderland House in Curzon Street. The new Duchess of Marlborough was adored by the poor and less fortunate tenants on her husband's estate, whom she visited and to whom she provided assistance. She later became involved with other philanthropic projects and was particularly interested in those that affected mothers and children. She was also a social success with royalty and the aristocracy of Britain.

Consuelo Vanderbilt gave birth to two sons, John Albert William Spencer-Churchill, Marquess of Blandford (who became 10th Duke of Marlborough) and Lord Ivor Spencer-Churchill.

Consuelo Vanderbilt and Charles Spencer-Churchill, The Duke of Marlborough divorced in 1921. Shortly afterwards, on ​25 June 1921 The Duke of Marlborough  married Gladys Deacon.  ​

A few days later, on 4 July 1921, Consuelo Vanderbilt married Colonel Jacques Balsan, a textile manufacturing heir and a record-breaking pioneer French balloon, aircraft, and hydroplane pilot who once worked with the Wright Brothers. Jacques Balsan was a younger brother of Etienne Balsan, who was an early lover of Coco Chanel. ​

​After the annulment of her marriage to the Duke of Marlborough, ​Consuelo Vanderbilt-Balsan still maintained ties with favorite Churchill relatives, particularly Winston Churchill, cousin of The 9th Duke of Marlborough. He was a frequent visitor to her château, in Saint-Georges-Motel, a small commune near Dreux about 50 miles from Paris, in the 1920s and 1930s, where he completed his last painting before the war.

During World War I, Consuelo Vanderbilt worked as the chair of the Economic Relief Committee for the American Women's War Relief Fund.

During the inter-war period, she and Winaretta Singer-Polignac (the Princess de Polignac and Singer Sewing Machine heiress) worked together in the construction of a 360-bed hospital destined to provide medical care to middle class workers. The result of this effort is the Foch Hospital, located in Suresnes, a suburb of Paris, France. The hospital also includes a school of nursing and is one of the top ranked hospitals in France, especially for renal transplants. It has remained true to its origins and stayed a private not-for-profit institution that still serves the Paris community. It is managed by the Fondation médicale Franco-américaine du Mont-Valérien, commonly called Foundation Foch.