| Honorific Prefix: | Baron |
| Émile de Cartier de Marchienne | |
| Honorific Suffix: | GCVO GBE GCSG |
| Office1: | Belgian Ambassador to the United Kingdom |
| Term Start1: | 1927 |
| Term End1: | 1946 |
| Predecessor1: | Ludovic Moncher |
| Successor1: | Alain Obert de Thieusies |
| Office2: | Belgian Ambassador to the United States |
| Term Start2: | 1917 |
| Term End2: | 1927 |
| Predecessor2: | Emmanuel Havenith |
| Successor2: | Albert de Ligne |
| Office3: | Envoy Extraordinary and Minister Plenipotentiary in Cuba, Haiti and the Dominican Republic |
| Term Start3: | 1926 |
| Term End3: | 1927 |
| Office4: | Envoy Extraordinary and Minister Plenipotentiary in China and Siam |
| Term Start4: | 1910 |
| Term End4: | 1917 |
| Birth Date: | 30 November 1871 |
| Birth Place: | Schaerbeek, Belgium |
| Death Place: | London, United Kingdom |
| Nationality: | Belgian |
| Spouse: | |
| Parents: | Paul-Émile de Cartier de Marchienne Louisa Brown O'Meara |
| Relations: | Marguerite Yourcenar (niece) |
| Awards: | Civic Decoration, Order of Leopold, Order of the Sacred Treasure, Legion of Honour |
Baron Émile-Ernest de Cartier de Marchienne (30 November 1871 – 10 May 1946) was a Belgian diplomat who was ambassador to a number of countries, most principally the United States and the United Kingdom.
De Cartier de Marchienne was born on 30 November 1871 in Schaerbeek, Belgium. He was the son of Baron Paul-Émile de Cartier de Marchienne (1837–1887) and Louisa Jane Brown O'Meara (1849–1935), who had been born in London.[1] His family owned the Château Bilquin de Cartier, a château in Marchienne-au-Pont, Belgium.
Through his sister, Fernande de Cartier de Marchienne, he was uncle to the French novelist Marguerite Yourcenar.[1]
In 1896, at only 25 years old, Baron de Cartier de Marchienne was put in charge of the Belgian legation in Rio de Janeiro, Brazil. He served briefly before becoming secretary of the Belgian legation in Tokyo.
From 1910 to 1917, he served as Envoy Extraordinary and Minister Plenipotentiary in Peking, China and Siam. From 1917 to 1927,[2] he was head of the Belgian legation in Washington, D.C. (which was elevated to an Embassy in 1919), while also serving as Envoy Extraordinary and Minister Plenipotentiary in Cuba, Haiti and the Dominican Republic from 1926 to 1927.[3] [4]
From 1927 until his death in 1946, which included all of World War II, he was the Belgian Ambassador to the United Kingdom, of which the last six he was Dean of the Diplomatic Corps.[5]
In New York in 1907, he married American Alice Draper Coburn (1876–1907), the daughter of Charles Henry Colburn and Frances Eudora (Draper) Colburn. A niece of Governor Eben S. Draper, industrialist George A. Draper and diplomat William F. Draper, she was ill when they married, and died not long after on 25 November 1908 at her mother's home in Phoenix, Arizona.[6]
On 16 July 1919, he married American socialite Marie Emery (Dow) Cary at the Church of the Madeleine in Paris,[7] the widow of Hamilton Wilkes Cary since 1917.[8] [9] She had previously married, and divorced in 1909,[10] [11] multi-millionaire Elihu B. Frost, President of the Submarine Boat Corporation.[12] [13] [14]
The Baroness died on 18 February 1936,[15] leaving a net estate worth $685,026.[16] As he had no children from either of his marriages, he adopted his distant relative, Louis de Cartier, in 1946 to keep the name "de Marchienne" in the family. The Baron de Cartier de Marchienne died on 10 May 1946 in London, United Kingdom.[17]
Baron de Cartier received honorary doctorates from Princeton University, Columbia University, Brown University, University of Rochester, Villanova University, as well as the Universities of Oxford, University of Edinburgh and University of Belfast.[17]
He was also awarded with: