The architecture of the classical temple in the Magna Graecia area represents, despitethe multiplicity of its forms and the simplicity of the construction system, one of themost effective and grandiose ideas of the Mediterranean archetypes. Starting from simpleelements: base, walls, vertical supports, horizontal entablature, roof and pediment,building typologies of increasing monumentality and degree of differentiation are stilllegible today, which give rise to the development and construction of authentic wondersin the field of architecture.In addition to the survey of the remains present in the archaeological sites, the analysisof the elements that bring us back to the concept of number and proportion understoodin this context, both in a concrete and semantic way, according to the interpretation ofthe Pythagorean School, is relevant. This geometric rigor is the inspiration that leads tothe analysis of some temples in the archaeological park of Selinunte, three-dimensionalarchitectural models that confirm a repeatable and recognized classical language.