Mummified culture was exhibited during one of the most controversial Venice Biennials, that of 1972, marked by the stir around the Second solution of immortality by Gino De Dominicis. Mattiacci participated with four works: "Primary Alphabets" (1972), twelve cast aluminum stelae reproducing imaginary lost alphabets; "Planisphere with time zones" (1972), seven clocks fixed to the wall; "Total Project" (1972), consisting of a real working telephone accompanied by a series of international telephone directories, and the work in the GAM collection "Cultura mummifiata" , artfully disordered accumulation of one hundred casts of cast aluminum books, already presented in Rome at the beginning of the year together with Primary Alphabets. Four works on the cultural codes at the basis of our learning: the alphabet and the clock, which determine language and time, the telephone, capable of modifying our perception of communication and physical distance and finally books, safes of knowledge, history, archive of Western society. The disorder of the volumes, placed on the ground in an uneven heap, some of them balanced, resting on top of others in a vertical position, is only apparent: they are immobile, fixed, "mummified". Mattiacci constructs a conceptual image that reflects on culture as a convention, on the risk of closure and the static nature of knowledge, managing to maintain a clear and evocative gaze.