Architecture is the least corruptible witness of history. A reflection on historic authenticity architectural matter

As the concept of cultural heritage has broadened, we have understood that it consists of more than just matter. Its intangible values have been discovered, also and the concept of authenticity has been taken into consideration. Nowadays, it has been accepted that the Western restoration theory is not applicable in every case since it was created to be applied to long-lasting stone architecture. The history of Andalusi (Islam in Spain) architectural restoration allows us to verify correct decisions, mistakes a well as the difficulties of applying the restoration theory born for stone European architecture, when applied to another type of acrchitecture characterized by the use of decoration made of fragile materials, and linked to an artistic culture which is narrowly connected to the idea of replacement and preservation of traditional techniques. The restoration of Andalusi architecture implies specific problems related to its material features. This unique heritage has confronted Spanish restoration theory and methods with particular problems and reflections, and this in turn has made our understanding of cultural differences in the concept of authenticity easier.