The church of Sant'Ignazio di Loyola in Campo Marzio is a Catholic church, in Baroque style.The facade of the church is structured on two orders, the lower and the upper. In the lower part, the central door is highlighted, flanked by two large columns with Corinthian capitals. In the upper part, aligned with the central door, there is a large window which allows light to enter the church, illuminating the nave. At the ends of both sides, the large reverse volutes are noteworthy, very similar to those conceived by the genius of Leon Battista Alberti for theBasilica of Santa Maria Novella in Florence. The church, 81.5 m long and 43 m wide, has the shape of a Latin cross, with an apsidal presbytery and six side chapels, three on the left and three on the right. The church is well known for the square paintings by Andrea Pozzo. When you look up, standing at the point marked on the ground by a golden disc placed on the floor of the nave , you can admire the perspective simulation of a second temple, superimposed on the first, the real one of the church; this simulated architecture, in perspective "from below up", is articulated on two orders, one lower and one higher, and with a sinuous movement of columns, arches and entablatures, it extends upwards where, in a light gold, the Glory of Saint Ignatius is depicted, with Christ manifesting the standard of the cross. A beam of light radiates from Christ's side and illuminates Ignatius, from whom, in turn, it departs towards four allegorical figures around him that represent the four continents known at the time. Another sign in the floor, a little further towards the altar, marks the point for the ideal observation of a second perspective canvas, above the cross vault, which reproduces the image of a dome. In fact, the majestic masonry dome envisaged by the project, perhaps for economic reasons, was never built. It is also said that it was the locals who did not want a dome that was too large to block out the sun. In addition to these masterpieces of perspective painting, the six chapels located along the side naves should be noted which, with elegant proportions and sumptuousness, make the entire architectural layout more complete and harmonious. Scenes from the life of Saint Ignatius are represented in the apse , such as the Defense of Pamplona, ​​in which Ignatius was wounded. In the cap of the apse Andrea Pozzo implemented another of his perspectival virtuosities: in fact he managed to represent a fictitious architecture with four straight columns in a concave surface. Also noteworthy are several other works of art: on the counter-façade the two stucco statues depicting Religion and Magnificence by Alessandro Algardi, in the second chapel on the right, designed by Nicola Michetti, the solemn altarpiece with the Transit of San Giuseppe by Francesco Trevisani, the altar in the right transept, by Andrea Pozzo, with the relief of San Luigi Gonzaga by Pierre Legros. On the sides of the presbytery, on the right, there is the Ludovisi chapel with the sepulchral monument of Pope Gregory XV by Pierre Legros and four stucco statues with the Virtues , by Camillo Rusconi; in the corresponding space on the left, which gives access to the sacristy, is instead placed the colossal plaster statue of Sant'Ignazio , also the work of Rusconi and model of the one made in marble for the Vatican basilica (thank you Wikipedia)