This lecture discusses the concept of superimposed structures, where beams or walls are placed on top of each other to create modern and flexible buildings. The instructor demonstrates a simple structure using cardboard elements, showing how the system remains stable despite its large dimensions. The lecture explores the design principles behind superimposed structures, showcasing examples such as the Kerez House in Zurich. By strategically positioning walls and utilizing appropriate thicknesses, architects and engineers can achieve both flexibility and stability in building design.