The Basilica of Our Lady of the Pillar is an amazing religious tourist destination in Buenos Aires. The church has stunning architecture and stunning landscape, including a huge garden. It was declared a National Historic Monument of Argentina in 1942. It is an 18th-century Jesuit church (built 1716) and derives its name from the patron saint of the city of Zaragoza in Spain. You can take a tour around the church and visit the small museum, which contains its share of religious artifacts, including paintings, writings, clothing, and more.