Herman Hertzberger lectures on projects spanning from the early 1970s through 2000, including the Centraal Beheer offices and the Chassé Theatre. He described the main focus of his work as communal and social space. Hertzberger works to achieve these through multiplying of sight lines in order to see as many people as possible, through the creation of more stairs than necessary for circulation in order to create informal gathering spaces, and by never closing space off in corridors.