This issue 201 of “Engramma” is published exactly one hundred years after the subject it focuses on: the conference on The Serpent Ritual given by Aby Warburg in Kreuzlingen on 21 April 1923. The research presented in Engramma 201 aims at highlighting the theoretical importance of the shift between the two different versions of the conference conclusion, as first observed by Monica Ferrando and Monica Centanni on the occasion of the publication of Warburg and Living Thought (2022).