Heidegger stayed regularly at a hut built for him in 1922 above Todtnauberg in

the Black Forest mountains, retreating there when he could. As he grew older,

he philosophised about these circumstances: the forest walk became important

to his writing and he gave at least one lecture on skiing. He claimed that

thinking was analogous to following a forest path, naming one volume of

essays Holzwege after forest paths, and another Wegmarken, waymarks, after

the signs that help walkers stick to a trail. With this in mind, I invite you on a

mountain walk to introduce some aspects of Heidegger’s thinking concerning

architecture, and some of its difficulties.