"CLASSICAL STYLE" of architecture in Europe can be formalized logically based on "symmetry of reflection". In this paper I give a definition of procedure to make two types of graph, called M1&M2, from the forms of architectures called "CLASSICAL STYLE" in Europe, to analyze the features of the forms of the architectures of renaissance, mannerism, baroque, rococo and neo-classiccism, namely "CLASSICAL ARCHITECTURES". In this "PART 1", I give a series of definitions to abstract two types of logical models (graphs) M1&M2, and explain a little the meaning of these models (graphs) to continue on "PART 2".
