Ia tusia se faaauauina o lenei palakalafa - I le 34 o ona tausaga, na lauiloa ai Fehn i le lalolagi atoa ona o lana ata o le Fale Faʻataʻitaʻi o Nouei i le 1958 Brussels World Exhibition
. I le 1960s na ia gaosia ai ni galuega se lua na tumau pea i lona olaga: o le Nordic Pavilion i le Venice Biennale (1962) ma le Hedmark Museum i Hamar (1967<unk>79). O isi galuega iloga e aofia ai le Norwegian Glacier Museum i Fjærland (1991-2002) ma le National Museum of Art, Architecture and Design i Oslo (2003<unk>08).