The church which draws many pilgrims, aside from the tourists, is famous for the conversion of the Jewish financier Alphonse Ratisbonne. He became a priest and missionary in the Middle East after he saw a vision of the Blessed Mother in this church near Piazza Spagna. At the Altar of the Miracle, where the priest offered Mass not facing the people, and which still has its Communion Rail, Ratisbonne in a flash saw Our Lady as he entered the church.She showed him the beauty of the Catholic Church and its necessity for the salvation of all people.
Near Sant' Andrea della Fratte, further down the road, the young St. Teresa of Liseux and her father lived, when they came to Rome to meet the pope.
St. Maximillian Kolbe came here often when the was studying in Rome. He also offered his First Mass at the Altar of the Miracle.