The Church of Santa Maria degli Angeli, located in Civita di Bagno (L’Aquila), presents a single-nave architectural plan. Presumably dated to the early 18th century, the church’s primary structure comprises stone masonry walls and a gabled roof supported by a timber truss system. A later addition, functioning as a sacristy, adjoins the main edifice. The 2009 L’Aquila earthquake induced significant damage to the church, triggering local collapse mechanisms. To assess the building’s seismic performance, a numerical model is developed in 3Muri, using the equivalent frame approach. This methodology discretizes the masonry into piers and spandrels, interconnected by rigid links. Modal and nonlinear pushover analyses are conducted to evaluate the dynamic characteristics and lateral capacity of the structure. The results of this study provide insights into the building’s seismic vulnerability and inform potential retrofitting strategies for enhancing its performance.