This revised edition of Patrick Seguin's 2013 volume on Jean Prouvé's Maison Démontable 8x8 Demountable House includes new images and layout. In 1938, continuing his research into demountable houses, Prouvé came up with the structural principle of the axial portal frame, which he patented the following year. He applied it to his government-commissioned eight-meter modules, documented here.