Essai de restitution des ambiances lumineuses de la medersa merinide d'El Eubbad a Tlemcen, Algerie.

This research explores the authentic luminous ambiences that characterized the medersa of El Eubbad in Tlemcen in Algeria. These atmospheres have been profoundly altered due to the different rearrangements that have affected this building. Based on historical evidence and an architectural analysis of the other medersa dating from the same dynasty (Marinid), a restitution of the architectural conformation was first proposed. Then, a restitution of the luminous environment is suggested. The first part of this research is a reading of the architectural conformation relative to the luminous atmosphere including: i) the identification of lighting devices, ii) the various adopted lighting strategies (reflecting, filtering, diffusing), and iii) the sensory luminous effects generated in the different spaces of the medersa. The second part is devoted to the luminous environment quantitative characterization, by means of computer simulation, in the places (the prayer room and the room) where the 'Taleb' (the student) performs visual tasks (writing and reading). The results show a finely hierarchized architectural richness in order to create a luminous environment specific to the various places of the historical edifice and suggest a temporal dimension inherent to the luminous atmosphere prevailing there. The full text of this article is in French