In 1936, during my stay in Rome, Heidegger gave a lecture on Holderlin at the German-Italian Ctilture Institute. Afterwords, he
accompanied me to our apartment and was visibly taken aback by the poverty of our furnishings. (…)
The next day, my wife and I made an excursion to Frascati and Tusculum with Heidegger, his wife, and his two small sons, whom I
had often cared for when they were little. It was a radiant afternoon, and I was happy about this final get together, despite undeniable reservations. Even on this occasion, Heidegger did not remove the Party insignia from his lapel. He wore it during his entire stay in Rome, and it had obviously not occurred to him that the swastika was out of place while spending the day with me.
Source: New German Critique 45 (Autumn 1988): 115-116
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