Its plan, basilica, presents a wide and open space structured in three naves covered with flat roofs. The naves are separated by five semicircular arches that descend on pillars of unequal size, the boundaries with the central nave being larger. Chapels are located on both sides. The architectural element that stands out volumetrically from the ensemble is the presbytery, covered by a half-orange vault on pendentives ornamented with trapezoidal geometric elements, and which is accessed through a large semicircular central arch. At the foot of the temple and raised on pillars is the choir.

From an artistic point of view, the most valuable element is the altarpiece, inspired by the Italian model of Vignola, more specifically in his masterpiece, "the Gesu" of Rome, of great interest not only for its structure and the colossal use of classical orders, but also because of the richness and complexity of both the sculptural and pictorial iconographies that it houses.

Externally, the factory, which alternates between regular and irregular ashlar masonry, differentiates the basilica floor plan and the head of the presbytery, and both the portal and the window openings of the first body of the facade are pointed and flared. The central body, higher in height, laterally has three circular openings to give light to its interior. The tower is a unique element due to the quality of the stalls, the breadth of its dimensions, the beauty of the small semicircular openings arranged on an axis with the widest window of the bell tower, the successive careful cornices - one adorned with gargoyles, another molded-, and the four vases that crown its corners, the work of the brothers Juan and Iñigo Mojica (1553)