The characterization and classification of masonry buildings across the Italian territory is a crucial step in understanding their seismic vulnerability. This paper presents a comprehensive taxonomic analysis of masonry structures at the national scale, based on data extracted from official census databases and technical inventories. The study aims to trace the evolution of construction techniques and materials over time, offering a detailed overview of how building practices have changed across different historical periods.

A key component of the research is the subdivision of masonry building stock into age of construction, each associated with specific structural characteristics, such as wall typologies, floor systems, and type of masonry. These characteristics are statistically analyzed to identify patterns and recurring configurations within each era. The resulting taxonomy highlights both regional and chronological differences, providing valuable insights into the diversity of the existing built heritage.

The outcomes of this study are instrumental for supporting large-scale vulnerability assessments, particularly in the context of multi-hazard risk evaluation and prioritization of retrofitting interventions. By offering a systematic classification framework, this work contributes to the development of data-driven methodologies for the preservation and protection of historic and ordinary masonry buildings in Italy.

Keywords: Masonry buildings, Taxonomy, Census data, Masonry building typologie.