Masonry structures are extremely vulnerable to seismic events affecting the development of many countries worldwide. This study focuses on the seismic behaviour of a traditional masonry structure located in Faial Island – Azores (Portugal), which was hit by an earthquake of Mw = 6.2 on July 9 th, 1998. The analyses were conducted through a probabilistic performance-based seismic approach employing a stochastic finite-fault ground motion simulation method to derive region-specific records and nonlinear numerical models to compute the capacity of the building. Subsequently, fragility curves are derived considering different seismic scenarios. The results show a significant probability of the structure reaching moderate to extensive damage.