The majestic St. Louis Gonzaga Cathedral is the spiritual heart and architectural landmark of the city of Novo Hamburgo. Built in a solemn and grand Roman Basilica style based on the design of architect José Lutzenberger, the church impresses with its scale and harmonious forms, holding a central place in the historical landscape of Brazil.

The interior of the cathedral is no less magnificent than its exterior. The crown jewel of the interior is considered to be the paintings by Italian master Aldo Locatelli, created in 1959. His frescoes, depicting Saint Louis Gonzaga, bestow a special spiritual atmosphere upon the space. The church is also famous for its precious "Bohn" pipe organ, which fills the vaults of the three naves with a unique sound during services.
The cathedral serves as the functioning mother church of the diocese and is held in high esteem by both locals and tourists. Its towers, equipped with a modern illumination system, become a bright landmark at night, highlighting the significance of this historical and religious monument.