The building is typical of Franciscan churches of the period with a single nave, a quadrangular apse and a trussed wooden roof. At a width of , the nave is wider than the common 21.10 metres. A more open look is achieved by arches which progressively project inwards. The interior was altered in the second half of the 16th century when altars were placed along the lateral walls. From 1768 to 1773, two sets of side chapels were added while the church was given a sober Baroque appearance. The dome over the transept was also added in 1773. The original facade has been heavily restored. Its rose window has been replaced but the sculpted marble portal survives intact.
