The Jesuit block that held the city's first university, first theatre, first museum and the Biblioteca Nacional; it includes San Ignacio, the oldest church still standing, and colonial tunnels used for defence and smuggling.
- Address
- Perú 272, Monserrat
- Hours
- Wed-Sun 11:00-18:00; closed Mon, Tue (Google hours via Wanderlog, 2026-10)
- Best time to go
- Afternoon · About 1 h
- Price
- Price not verified
- Price level
- $
Details can change. Check hours and prices before you go.
Good to know
- Visits are guided; the tunnels and the Procuraduría de las Misiones were closed for restoration when the city tourism board last updated its page.
- The name comes from an 1821 article in the newspaper El Argos.