Heritage restoration has in the last years been one of the most vigorously growing fields of architecture. So it is no surprise that many awards of late have been for interventions on the already built. The Prize for Spanish Architecture, annually given since 1993 by the Spanish Association of Architecture Institutes (CSCAE), has for 2015 gone to Víctor López Cotelo’s conversion of a military hospital into the Granada School of Architecture (see Arquitectura Viva 172), a work which the jury headed by Jordi Ludevid has deemed exemplary in its capacity to integrate the complex’s heterogeneity under a global concept. López Cotelo opens this issue with an article about houses built over preexistences.