This PhD deals with heritage, or just old things, by revisiting 3 of our projects on adaptive reuse. The starting point is the built work and evidence of this action, from which explanations are sought.<br><br>These three works are examples where we were able to listen to a personal and coherent understanding on the existing from the future users. All three are from different worlds: textile manufacturers, art and theater, each with different concerns about the building that was going to be their future working space. Each gave us a clue about different aspects that make things worth keeping.