The scope of this study, tries to explain the definition of the architectural axis and its influences in the process of space organisation with all due aspects to the strong relationships between geometry and architecture. In doing this, the roles of the architectural axis in the spatial evolution of the architectural history are also explained in accordance with its various characteristics in different eras.The study tries to reveal the direct and primarily effects of the architectural axis in development of the architectural form in parallel with the spatial evolution througout all the history of architecture. Some invariable concepts are explained by means of the geometrical characteristics of the axis to make these effects more obvious to understand.All these explanations are aimed to be enriched with the historical examples to justify the conceptual statements.As a result, the whole study tries to reach the idea that the axiality which is born with different use of the architectural axis in the process of space organisation has different meaning and it is interpreted differently in parallel with the social economic and cultural characteristics of the era that it belongs. This idea is shown as a main reason of the changes in building forms and their spatial characteristics in all architectural history.KEY WORDS: Geometry, Point, Line, Axis, Plane, Volume and Form, Space, Meaning, Verticality and horizontality, Power, Symbol, Symmetry, Asymmetry, Balance, Perspective, Aperspective.