Louis-Christophe Zaleski-Zamenhof Louis-Christophe Zaleski-Zamenhof Louis-Christophe Zaleski-Zamenhof (born Ludwik Krzysztof Zamenhof, 23 January 1925) is a civil and marine engineer, specializing in the design of structural steel and concrete construction. He is a grandson of the Polish-Jewish L. L. Zamenhof, the originator of the international auxiliary language Esperanto. Since the 1960s he has lived in France. He was born in Warsaw. After his father Adam Zamenhof was arrested and shot to death by the Nazis occupying Poland, he and his mother Wanda barely escaped deportation to the Nazi death camp at Treblinka where his aunts Zofia Zamenhof and Lidia Zamenhof were murdered. The
Ludwik Birkenmajer w przekładzie polskim" (1920) · Mikołaj Kopernik, "O obrotach ciał niebieskich i inne pisma" (2004) · Andrzej Śródka, "Uczeni polscy XIX-XX stulecia". Warszawa 1994, vol. I, p. 155-157 . Paweł Tarasiewicz, Zbigniew Pańpuch, "Birkenmajer Ludwik Antoni", "Powszechna encyklopedia filozofii" vol. I, Lublin 2000 · Władysław Horbacki, "Ludwik Antoni Birkenmajer (1855-1929)". Łódź 1930 Ludwik Birkenmajer Ludwik Antoni Birkenmajer (18 May 1855 - 20 November 1929), Polish historian of science, physicist, astronomer, professor of the Jagiellonian University. Descended from the German family settled in Galicia (Southern Poland) during the time of the Napoleon wars, later a part of the Austrian Habsburg Empire.