.- Continuing his custom of saying Holy Thursday Mass outside a sacred place, Pope Francis this year will visit one of Rome’s most well-known prisons, the Regina Coeli, located in the historic Trastevere neighborhood.

The Pope will celebrate the Mass of the Lord’s Supper March 29. During the ceremony he will wash the feet of 12 inmates. He will also meet with prisoners and visit sick inmates in the prison’s infirmary.

Originally the site of a 17th-century convent, from which it gets its name, the Regina Coeli prison was constructed in 1881 by the Italian government after the country’s unification. A women’s prison, called the Mantellate, was later built nearby, also on the site of a former convent.

The prison has been visited by popes on three former occasions: by St. John XXIII in 1958, by Bl. Paul VI in 1964, and by St. John Paul II in 2000.

Like most prisons throughout Italy, Regina Coeli has had issues with overcrowding and inmate suicide in recent years.

For Pope Francis, this will be the fourth time during his pontificate that he has celebrated Maundy Thursday Mass at a prison. The first was in 2013, just after becoming Pope, when he visited the Casal del Marmo youth detention center.

This occasion was notable for being the first time a Pope included females and non-Christians among those whose feet he washed. At the time, liturgical law permitted only men's feet to be washed in the Holy Thursday ceremony.

In January 2016, the Congregation for Divine Worship and the Discipline of the Sacraments modified the Roman Missal to allow for women's feet to be washed at the Holy Thursday Mass, though it added that those chosen are to be “from among the People of God.”

The Roman Missal's text was modified to say that “those chosen from among the People of God are accompanied by the ministers,” while it had previously read: “the men chosen are accompanied by the ministers.”

“People of God” is an ecclesiological term adopted by the Second Vatican Council's dogmatic constitution on the Church, Lumen gentium, to indicate the Church of Christ, which “subsists in the Catholic Church.”

Pope Francis said Holy Thursday Mass at a center for asylum seekers in Castelnuovo di Porto, a municipality just north of Rome, in 2016. There he washed the feet of refugees, among whom were Coptic Orthodox, Muslims, and Hindus.

In 2015 the Pope went to Rome’s Rebibbia prison, and in 2017 he visited Paliano prison located south of Rome.

In 2014 he visited people with disabilities, saying Mass at the Don Gnocchi center for the disabled.