In the heart of the historic center of San Luis stands the majestic San Luis Cathedral (Iglesia Catedral de San Luis). This primary Catholic church of the region is a striking example of neoclassical architecture and a spiritual landmark for residents and visitors of Argentina.

The cathedral's main architectural feature is its grand pediment supported by six massive Corinthian columns, lending the building an air of ancient nobility. It serves as the seat of the diocese, drawing attention not only for its religious significance but also for its flawless symmetrical forms.
Visitors appreciate this site for its peaceful atmosphere and the well-preserved state of its historic appearance. With a 4.6 rating based on traveler reviews, the cathedral is rightfully considered a must-visit on any itinerary for those wishing to experience the cultural heritage of the Cuyo region.