Jules Horowitz, a French physicist, was born on the 3rd of October 1921 in Rzeszów in Poland and died on the 3rd of August 1995 in the 7th arrondissement of Paris.
His parents, most likely in order to seek refuge for their children and themselves from the antisemitism in strongly catholic Poland, emigrated to Weimar Germany.
The school had, since June 1940, abandoned its former location on La Rue Descartes in Paris to move to Lyon and the Zone Libre, losing its military status.
When the school returned to Paris in April 1943 after the invasion of the Zone Libre by the Germans in November 1942, Horowitz probably stayed in the south like his fellow students (denoted "bis" by the administration), having been naturalised at least 8 years earlier and being of Jewish faith.
Instigator of the Laue-Langevin Institute i the early 1960s, he was also president of the board of directors at the European Synchotron Radiation Facility during its creation (1988 to 1993).