• Departing from the intention to explore Frank Gehry’s drawings serving to their own designer to grasp ideas during the process of their genesis, the article examines Frank Gehry’s concern about the revelation of the first gestural drawings and all the sketches and working models concerning the evolution of his projects, and his intention to capture the successive transformation and progressive concretisation of architectural concepts. The article also compares Gehry’s design process with that of Enric Miralles, Alvar Aalto, Bernard Tschumi, and Le Corbusier. It sheds light on Miralles, Aalto, Le Corbusier and Gehry’s interest in a holistic understanding of all the parts of an architectural project, which is expressed through their tendency to draw the different sketches concerning the same project on the same sheet of paper. At the core of Gehry’s design approach is the osmosis of function and morphology. This aspect of his design vision could be compared to Alvar Aalto’s design process. At the core of the article are the distinction between communication drawings and conceptual drawings, and Gehry’s concern about achieving an osmosis between function and morphology. The article also investigates Gehry’s use of uninterrupted self-twisting line in his sketches, exploring his intention to enhance a straightforward relationship between the gesture and the decision-making regarding the form of the building.