It is one of the most besieged constructions during all the military conflicts that the city endured, as it held a strategic position and defended the southern and western entrances of the city.

Its exterior features two sober-style doorways. The main doorway dates back to the 17th century and consists of two levels and a cornice, adorned with Doric-style pilasters and niches housing magnificent sculptures. At the top, there is a central relief elaborated in marble that represents "The Vision of San Agustín," depicting the saint kneeling and assisted by a pair of angels.

The lateral doorway follows a Herrerian style and is more austere than the main one. The broken pediment still displays the Agustinian coat of arms, which is a heart pierced by two arrows symbolizing the divine love that burned within San Agustín.

The temple has a cross-shaped floor plan, and its dome is reminiscent of Byzantine-style domes.

Inside, the beautiful sculpture of San Nicolás Tolentino located in one of the side chapels stands out.