It is said that the Jesuits longed for a place of worship that was worthy of the Jesuit order, and so when the time came to build their church, they modeled it on the Iglesia de Gesú. The church was constructed between 1624 and 1638 by Martín de Aspirate, who built the three naves and a dome. Today, it is considered one of the most beautiful in Peru. The church has baroque altars decorated in gold leaf, as well as a dazzling sacristy. Also of note are the numerous colonial paintings and the San Ignacio de Loyola altar. The church retains its original bell, La Abuelita, which is the oldest bell in the country. Mass takes place at 7am, 8am, 9am, 12pm, 6pm and 7:30pm Mon-Sun.