From 1970 onwards, Deleu worked with T.O.P. office to build up an architectural and artistic body of work. During a trip to the United States, Deleu was struck by the ‘twin towers’ of the World Trade Centre in New York and by a fallen sequoia tree in California. According to Deleu, we can only get a sense of the size and volume of towers if one tower lies flat next to the other and we can walk alongside them. The overarching title of this research is Schaal en Perspectief [Scale and Perspective].