This study presents a critical look on the architectural drawing, including its reflections and more complex realities behind it. The transformations in architectural drawing as a language of thought have been analysed with the help of two eminent periods; the Renaissance and the Avant-garde. These periods excelled with the representation of their space perception as the most valuable periods in the history of architectural drawing. To gain an accurate evaluation during the study, a contextual reconstruction of the selected periods have been necessary. This "reconstruction" includes the position of the architect, the design methodologies, the role of drawing. Perspective and axonometry drawings are studied as pioneering tools to express the architect's abstract creation, and his ideologies on architectural space in the history of architectural drawing. Keywords: Architectural representation, architectural drawing, space abstract reduction.