Short answers, pulled from the story.
Károly Kerényi was born on the 19th of January 1897 in Temesvár, then part of the Austro-Hungarian Empire and now Timișoara, Romania. He died on the 14th of April 1973 in Kilchberg, near Zurich, and is buried in the cemetery of Ascona.
Károly Kerényi returned his passport in 1944 when German forces entered Hungary and installed a right-wing government. He had been residing in Switzerland with diplomatic status, so surrendering it made him a stateless political refugee overnight.
Károly Kerényi collaborated with the psychologist Carl Gustav Jung to establish mythology as a science of its own, reading Greek mythic figures as archetypes of the soul. From 1948 until 1966 he served as co-founder and research director of the C. G. Jung Institute in Küsnacht, near Zurich, lecturing there until 1962.
Dionysos is described as likely Károly Kerényi's most crucial single work. He began it as an idea in 1931 and did not finish writing it until 1969.
Károly Kerényi came to see Wilamowitz's philological method as resting on an authoritarianism he linked to the rise of National Socialism in Germany. He distanced himself from Wilamowitz on ethical grounds and worked instead toward a liberal, human-psychological idea of myth.
Károly Kerényi studied classical philology at the University of Budapest and as a visiting student at the Universities of Greifswald, Berlin and Heidelberg. He later taught at the University of Pécs from 1934 and the University of Szeged from 1941, and held visiting professorships at Bonn, Oslo, Rome, Zurich and Genoa after emigrating to Switzerland.