This article seeks to highlight the two founding moments of Richirian architectonics, when, in his early works, he sought a foundation for his own phenomenological approach. The first moment can be found in his work from 1979, Le rien et son apparence, which consists of an interpretation of the first version of Fichteʼs Doctrine of Science (1794-95).
We show first that it is by reading Fichte that Richir finds a first basis for his thought; and then we show also that it is in the very depths of the text of the WL that Richir finds the question of a phenomenological imagination, which he will not cease to develop in his later works, also drawing inspiration from Kant and Husserl. The second moment is found in the Recherches phénoménologiques (1981-83), where it is the revival of the Kantian theme of transcendental illusion that allows Richir to found his approach as a paradoxical mathesis of instability.