The International LISA Symposium is a series of Conferences which are celebrated every second year since its first edition in Chilton, near Oxford (UK) in 1996. The seventh edition was held in Barcelona, 16 to 20 June 2008, and organised by the Institut d'Estudis Espacials de Catalunya (IEEC) and the Instituto de Ciencias del Espacio (ICE-CSIC). The Symposium venue was CosmoCaixa, a remarkable contemporary Science Museum.