Everyone has their favorite parish in Rome. This is mine. It's the Gran. Madre di Dio at Rome's famed Milvian Bridge.
Come si vede dalla foto, it was constructed under the reign of Pius pp. XI. The interior is simple, but the exterior is grand.
Walk the riverside parapets up to the Ponte Milvio. This is where Constantine defeated Maxentius. Find the bridge on your map and walk there some afternoon and enjoy.