Professor emeritus at Ensa Nancy and researcher at the Laboratoire d'histoire de l'architecture contemporaine (LHAC), Joseph Abram is celebrating his 70th birthday this year. For the occasion, and under the direction of Ana Bela de Araujo, Émeline Curien, Pierre Maurer and Karine Thilleul, some sixty texts have been collected in a tribute book recently published by Jean-Michel Place.

Researchers, architects, former students and friends have lent themselves to the game of anecdote to illustrate the career of Auguste Perret's specialist and dedicate their time and memory to him in a collection of "mixtures" that revisits the foundations of contemporary architecture.