The Iglesia San Francisco is a few blocks from the Plaza de Armas and carries significant historical weight: this is the site where Piura declared independence from Spain in January 1821, making it the first city in Peru to do so. A plaque and small monument mark the occasion in the church square, and the annual independence festival here is one of the most spirited in the region.
The church itself is a solid colonial structure in stone and brick, less ornate than the cathedral but with a quiet dignity. The interior has been refurbished in recent decades and the original artwork is not as well-preserved as in some of Piura's other churches, but the historical significance makes it worth a stop.