After World War II, he was a frequent visitor to the United States, spending half a year at the Institute for Advanced Study at Princeton each year from 1955 to 1962 and also teaching as a visiting professor at Harvard, Yale, the University of Chicago, the University of Wisconsin, and Johns Hopkins.
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Following Husserl's Cartesian Meditations, a series of lectures given in Paris and one of the more important of Husserl's later works, Koyré met again with Husserl repeatedly and influenced his understanding of Galileo.
He studied and wrote about the political thought of Machiavelli, the historical epistemology of Alexandre Koyré and various religious manifestations such as shamanism.
Alexandre Dumas | Alexandre Benois | Alexandre Guilmant | Alexandre Yersin | Pierre Charles Alexandre Louis | Alexandre Pires | Alexandre Herculano | Alexandre Dumas, fils | Alexandre Barbera-Ivanoff | Alexandre-Antonin Taché | Louis-Alexandre Taschereau | Charles-Alexandre Léon Durand Linois | Alexandre Michon | Alexandre Lenoir | Alexandre Koyré | Alexandre Calame | Alexandre-Athenase Noghès | Pierre-Alexandre Monsigny | Pierre-Alexandre Aveline | Louis Alexandre Andrault de Langeron | Henri-Alexandre Wallon | Alexandre Vinet | Alexandre Tharaud | Alexandre Silva Cleyton | Alexandre Pato's | Alexandre Pato | Alexandre Millerand | Alexandre Massura | Alexandre Marine | Alexandre Luigini |