Integrated digital survey methodologies for the knowledge and enhancement of the ancient city walls. The “Curtain” of Santa Chiara in Cagliari (Italy)

The contribution shows some results of a multidisciplinary research in which architectural surveying and representation methods are supported by archival documents analysis. The procedure is applied in a limited area of the ancient walls of Cagliari (Sardinia, Italy). The sector consists in the meet point between the sixteenth century bastion called “Curtain” of Santa Chiara realized in the period 1575-1578 by the military engineer Giorgio Paleari and the curtain of de Cardona commissioned by the Viceroy in the 30s of the same century. The historical documents indicates the presence of medieval structures, vaulted chamber and passages designed and built during this period. This source, supported by the knowledge of construction techniques indicated in the military treaties, allows a first graphic representation of the sixteenth century bastion, of which today we can only recognize a part of the vaulted gun chamber positioned along the curtain of de Cardona.