Start the visit at the church of S. Luigi dei Francesi (Largo Toniolo close to the Pantheon), which hosts the three masterpieces of the St Matthew cycle by Caravaggio. Then walk round the corner to the church of St Augustine (Piazza S. Agostino) where you will find the Madonna of the Pilgrims. In S. Maria del Popolo (Piazza del Popolo) you can admire two famous paintings depicting the Conversion of St Paul and the Crucifixion of St Peter in the Cerasi Chapel. These are just the masterpieces that you can see in the churches. There are other Caravaggio paintings in the Galleria Borghese, the Galleria Barberini and the Capitoline Museums.