Since it was not possible to bring up every aspect of Dominique Iogna-Prat’s book, Cité de Dieu, cité des hommes [City of God, City of Men], the authors of this critical note chose to punctuate their reading with questions that progress gradually towards the central point of the work : the construction of modernity through the transfer of sacredness. The questions first involve the double metonymy Church/church and the Medieval concept of the city, and then move towards the meaning of the appropriation of Aristotle in the late Middle Ages, and finally examine the architectonic paradigm that presided over the birth of the Modern world.