Hola. La verdad es que no lo sé. Nosotros accedimos por las escaleras. Siento no ser de más ayuda.

This is not a large church compared to others and it is not easily accessed by the long stairway from Via Cavour (your direct walking route from Termini Station), so try to drop off bags at your hotel first.

Call first to make sure. Some churches don’t even allow people in during Easter services.

No I’m sorry i don’t.

Se ve directamente

According to the sign outside the church eucaristic celebrations are weekdays @8 & 12. Assume music is being played. Festivals are @ 9 & 11.

There was no charge when I was there. It's a gorgeous church add to your list. You could make a donation but no charge.

According to the tradition Elia Eudocia, mother of Eudossia, during a trip to Palestine in 442, you/he/she would have received from Giovenale Patriarca in Jerusalem as a gift, the chains that would have bound St. Pietro during the imprisonment, suffered in Jerusalem for order of Erode Agrippa. Elia Eudocia, his/her daughter Licinia Eudossia entrusted to bring her to Rome. In 432 it was chosen Pope Leo I, the tradition of the Church it tells that Licinia Eudossia showed the chains of Pietro to Leo I, that approached her to those that were of Pietro in the Jail Mamertino. For miracle the two chains were melted in irreversible way.

I don't know when they are taken out. But I will say that they are very clearly visible through the glass when kneeling in front of the reliquary in which they are housed. (Exact opposite of say, Mary's veil in Assisi, which is "displayed" twice a year. This means they open the doors of the reliquary, and it is still very difficult to see, given the protective screen, the distance at which the public is kept, and the height of the reliquary itself.)

Hola! Con el metro te bajas en Cavour cruzas la calle y caminando unos metros hacia la izquierda te topas con unas escaleras que te conducen a una plaza por donde se ingresa a la iglesia.Suerte!!