Seismic vulnerability assessment and consolidation techniques of ancient masonry buildings: The case study of a Neapolitan Masseria

•Seismic performance of an ancient Neapolitan Masseria has been evaluated.•Three analysis types based on the three evaluation levels foreseen by the Italian Guidelines on Cultural Heritage have been applied to the case study building.•The analysis results, compared to each other, have shown the problems and the high vulnerability degree of the building.•The simplest evaluation level (EL1), compared to the most detailed one (EL3), has provided unconservative results in predicting the building seismic vulnerability.•Consolidation interventions have been designed and applied to the structural parts of the Masseria to improve its seismic behaviour.