Fibrillar networks, materials belonging to the realm of finely-divided matter, can be obtained through two different systems: from polymer solutions giving rise to thermoreversible gels, on the one hand, and from organic molecules solutions, that self-assemble and produce organogels, on the other hand. This symposium was aimed at bringing together organic chemists working on organogels from self-assembled systems, and polymer physical chemists working on fibrillar thermoreversible gels.