Louis-Christophe Zaleski-Zamenhof

Zaleski-Zamenhof died in 2019. He is survived by his daughter Margaret Zaleski-Zamenhof, who as of 2020 is active in Esperanto circles.

Dr. Zaleski-Zamenhof wrote a foreword to L'homme qui a défié Babel ("The man who defied Babel", 2003), a French-language biography, by René Centassi and Henri Masson, of the originator of Esperanto.

In 2003 Dr. Zaleski-Zamenhof again addressed a World Congress, this time in Gothenburg, Sweden, recalling how, 60 years previous during World War II, the very name of Gothenburg had for him and his family been emblematic of human rights and freedom: "To us, then in occupied Warsaw, incarcerated within its infamous walls, Gothenburg was a fabled world from which, like the manna from the skies in Biblical times, a panoply of delicious foods used to come whose very existence we had by then long since forgotten. I will always remember the sender's name written on the packages: Einar Adamson, an Esperanto speaker from Gothenburg. I fondly remember having the chance in 1948 to meet him in person on the occasion of the Malmö World Congress of Esperanto, the only Congress I was able to attend during the decade after the war. At that time I also became acquainted with the city of Gothenburg, and became a friend with Adamson's entire family; moreover, Einar's daughter remains my very dear friend."

Thoroughly committed to the Esperanto cause, as attested by his customary public greetings to World Congresses of Esperanto on behalf of the Zamenhof family, Louis-Christophe Zaleski-Zamenhof was nevertheless been disinclined to assume a leading role in the Esperanto movement. Though he had no plans to write an autobiography, Polish journalist Roman Dobrzyński persuaded him to participate in a series of conversations over a ten-year period, which resulted in La Zamenhof-strato ("Zamenhof Street", 2003), a book detailing his life during the Nazi occupation of Poland, including his experiences in the Warsaw Ghetto and the Polish Resistance. Beyond an account of his own life, the book also relates the philosophy, history and tribulations of the Esperanto movement pioneered by his grandfather, and speculates as to the planned language's future prospects. The book has now been published in Polish, Esperanto, Lithuanian, Czech, Italian, Japanese, Portuguese, Slovakian, French and Korean.

In a 2001 speech, Dr. Zaleski-Zamenhof characterized the 86th World Congress of Esperanto in Zagreb, Croatia as not only the first such World Congress in the third millennium of the civil calendar but also the third century of Esperanto, reminding the delegates: "You came to discuss intercultural dialogue, the pressing need for which inspired the initiation of the international language. In fact, almost all his biographies relate the story of the young Ludwik Łazarz Zamenhof living in the multicultural city of Białystok, observing the animosity that then governed relations among the varied nationalities, not finding a commonly understandable language, a tool that was, as he said, necessary for dialogue among the respective cultures. Mutual dialogue enables people to understand and respect different cultures; without such an understanding, a foreign culture may appear strange or inimical and inspire disdain, contempt or hatred."

On 14 April 1999 Hanna Konopka, president of the Zamenhof Foundation of Białystok, announced that Pope John Paul II would be the first recipient of the Foundation's Tolerance Medal (Medalo de Toleremo). As well as the Esperantist trustees of the Foundation, the award committee included eminent persons such as Archbishop Stanisław Szymecki; the award met with general approval among the people of Białystok. Zaleski-Zamenhof presented the Tolerance Medal on 10 June 1999, during the Pope's historic visit to Poland.

The following year, Zaleski-Zamenhof sent a written greeting to the 87th World Congress meeting in Fortaleza, Brazil. Declaring that mankind is a species created for diversity, he congratulated the Brazilian hosts for the variegatedness of the nation's natural setting and the diversity of its peoples, customs and cultures and favourably compared Brazilians to the "great family circle" of worldwide Esperantism, urging people to not to see cultural differences as a threat but as their good fortune.

J. P. Bonin, G. Deleuil and L. C. Zaleski-Zamenhof. "Foundation analysis of marine gravity structures submitted to cyclic loading." Offshore Technology Conference, Houston, Texas (1976). pp. 571–579

After earning a doctorate in civil and marine engineering, he began work as a professional engineer. Beginning in Poland after World War II and since the 1960s in France, he has designed precast concrete structures and projects ranging from deep-sea oil rigs, sports complexes, and the Charles de Gaulle Memorial, which dominates the village of Colombey-les-Deux-Églises. He has also taught the theory and techniques of land and sea construction at various academic institutions.

Louis-Christophe Zaleski-Zamenhof (born Ludwik Zamenhof; 23 January 1925 – 9 October 2019) was a Polish-born French civil and marine engineer, specializing in the design of structural steel and concrete construction. He was a grandson of the Polish Jewish L. L. Zamenhof, the inventor of the international auxiliary language Esperanto. From the 1960s until his death, Zaleski-Zamenhof lived in France.