Introduction to dynamical systems with one and more degrees of freedom. Linear differential equations, analysis of systems of linear differential equations, normal coordinates and modal analysis. Continuous systems (beams, frames, two-dimensional structures). Seismic actions (outline of seismology, structural response to dynamic loads) and outline of the action of the wind. Fundamentals of earthquake-resistant buildings. Recovery and seismic reinforcements. Analysis of the technical laws on buildings. Analysis of a specific problem (multi-storey building in reinforced concrete, steel structures, masonry buildings, consolidation techniques, seismic reinforcements, ...).