The basilica of Santi Cosma e Damiano is a church in Rome, Italy, located in the Roman Forum. It is one of the ancient churches called tituli, of which cardinals are patrons as deacons: the Cardinal Deacon of the Titulus Ss. Cosmae et Damiani is Giovanni Cheli. The basilica, devoted to the two Greek brothers, doctors, martyrs and saints Cosmas and Damian, is located in the Forum of Vespasian, also known as the Forum of Peace.