Heidegger, at least in his writing, seemed the more concerned of the two with architecture. “We attain to dwelling,” he wrote, “only by means of building.” The house, for Heidegger, was an expression of an existential act, of “being in the world” and, when he wrote these words in the 1920s, the house he was thinking of was almost certainly the one he was in – a small wooden cabin in Todtnauberg, in the Black Forest, which he called “The Hut”.