It is with profound sadness that we report that Theodore Kisiel, a founding member of The Heidegger Circle, passed away early on Christmas morning at the age of 91 after a long illness. A renowned Heidegger scholar who taught at Northern Illinois University until his retirement, Ted was author of the seminal study The Genesis of Heidegger’s Being and Time and translator of Heidegger’s 1925 lecture course History of the Concept of Time, among many other notable accomplishments. He is survived by his wife Marie and daughters Caroline and Cassandra.

For an obituary and details of a livestream virtual memorial service to be held on January 16, please visit