There’s something almost magical about the light, taut forms of Santiago Calatrava‘s architecture. The intersection of lithe forms with dramatic open spaces creates a kind of symbiotic tension that seems to almost breathe. This is a poster concept for a lecture on form and light by the celebrated Spanish architect. A geometric pattern is drawn from the negative spaces formed by his design for the Bac de Roda Felipe II Bridge in Barcelona. Light weaves through the undulating forms to reveal a dynamic play between figure and ground.