The seismic vulnerability assessment on a territorial scale requires the application of simplified
procedures. Data collection is usually carried out by adopting external inspections; for this reason the
knowledge gained for the considered buildings is usually not complete and lack of information has to be managed.
The definition of a methodology which takes into account these aspects is one of the aims of this paper.
Another goal is the extension of the obtained results to buildings not directly surveyed on site, whose characteristics
are similar to those of the analyzed buildings.
The case study of Timisoara (Romania) is presented. A rapid survey of the historical center is performed and
recurring typologies are identified. Analyses of the most significant local mechanisms of collapse are implemented,
taking into account possible parameters variation. Fragility curves for each typology are then obtained
allowing the definition of vulnerability maps for the whole historical center
