With the Mariotti House, Parent and Virilio applied the theory of the oblique function to the program of a single-family house. Designed for a sloping plot of land located in Saint-Germain-en-Laye in the Yvelines department of France, this experimental house illustrates their research on the inclined “bridge volume,” whose floor spreads over a slope of differing levels, determining and isolating the living spaces. Large picture windows positioned at an inner angle to the supporting pillars ensure the interior of the whole house is filled with light. The absence of stairs and partition walls creates a continuous pathway unfolding not only inside, from one room to the next on sloped surfaces, but also outside, from the street towards the garden, where an access ramp leads to the roof terrace. After the client abandoned the project, a study for a second project on a plot in the Chevreuse Valley was undertaken, but neither of the two projects was ever built.