Loos’s architecture incorporates two traits of modern spirit: dynamism and simultaneousness. Loos organizes the spaces of his dwellings with a strong theatricality. The house is the sum of simultaneous stages related by multiple sets of stairs and visual openings. The action of going up or down a stair introduces the missing dynamism in bourgeois dwellings of nineteenth-century. The rooms, situated as small stages, transform their inhabitants in instantaneous actors of day-to-day life.