The architect André Ravéreau spent a large part of his life in Algeria, he is today an essential reference for Algerian builders of several generations. His daughter Maya, an architect herself, accompanies us to the places of his creations and his research, in the Mzab first where he lived, created, trained other architects in the "desert workshop" and had the oases of the Mzab classified as a UNESCO World Heritage Site. Inspired by tradition to better innovate as in the construction of the Ghardaïa post office, or in that of a very surprising villa... Then in Algiers where he worked to preserve the ancestral heritage of the Casbah, faithfully describing the principles of his construction in line with current concerns, such as the choice of environmentally friendly materials and avoiding energy waste, as testified by the architect Yasmine Terki, a great specialist in earth materials.