<p> In 1960s, Aldo Rossi (1931-1997) designed the three monuments for the partisan in World War II. The two were had not been realized, Monument to the Resistance in Cuneo (1962) and the Fountain in Milan (1962), and the other was realized, Segrate Fountain (1965-1967).</p><p> This paper analyzed the staircases of the three monuments designed by Rossi and revealed the system of the dimensions through the measurement of his early works. The author measured the realized Segrate Fountain, and specified relationship with the plans. After that, the proportion of the other monuments was analyzed in term of the staircases.</p><p> In Section 1, after measuring Segrate Fountain, the author dealt on the comparison of the stairs between Segrate Fountain and Feltre Fountain (1965), which was treated as preliminary version of Segrate Fountain. Through making 3D models, the change proportion of Segrate Fountain was specified. Segrate Fountain had an extruded prism with equilateral triangle of 2m and the stairs had the tread and rise of 20 cm and people sit on it. On the other hand Feltre Fountain had different proportion of triangle fountain from Segrate and its stairs on the back with the 30cm tread and 18cm rise. In the change from Feltre to Segrate, Rossi tried to use regular squares in the proportion of stairs.</p><p> In Section 2, it showed the measurement of staircase of Monument in Cuneo, shaped as a cube of 12m, with the slit on the top associated with the Realized staircase of Monument of Sandro Pertini in Milan (1988). Through the measurement of the first published plans in Casabella Continuità, counting its treads and rises of the staircase, it specified that the roof plan and section of the monument were not corresponded. Assuming height of the cave of stairs in which human could climb, it found that the tread and rise had the same size and were measured in range from 24cm to 25cm.</p><p> In Section 3, it dealt on the Fountain in Milan. Designed in the same year of Monument in Cuneo, shown as the cube of 10m surrounded with water veil, it was composed in a cantilevered fountain where water would flow along the walls. The C-shaped ledge on center pillar measured 50cm height and the same-sized depth. Stepping 6 stairs of the rise of 13.3cm and the tread of 30cm, people could walk around and seat the ledge as a pillar bench in that scale. The proportion was derived from silver ratio (1:√2) and ratio of regular square(1:1) and half of regular triangle(1:√3)</p><p> As the result, it was shown that Rossi integrated not only geometry but also human scale in his architectural monument. While he rendered the monuments in geometrical rigidity, the staircases enabled the monument for living humans to be stepped and climbed. In his citation of Plato in A Scientific Autobiography, the soul finally entered into the light as if they had some volume like body. The monument for the Italian partisan also the place where souls gathered, and it was supposed that staircase had played a role to connect the living and the dead in same place.</p>