Federico Soriano's architecture hinges around an analysis of 'traces'. He has defined his work as an attempt to bring out the forms which are found at the underground level. In this lecture he traces six specific issues that interest him and explores them in conjunction with images of his work. A Professor at the Escuela Tecnic Superior de Arquitectura de Madrid since 1990, Federico Sorriano is also editor of the Fisuras de la Cultura Contemporanea review.