Hidden away off Calle de Segovia, this basilica is something of a surprise. Its convex, late-baroque facade sits in harmony with the surrounding buildings of old Madrid. Among its fine features are statues representing the four virtues, and the reliefs of Justo and Pastor, the saints to whom the church was originally dedicated. The rococo and Italianate interior, completed by Italian architects in 1745, is another world altogether with gilded flourishes and dark, sombre domes.