Pope Francis on Sunday asked for prayers for a meeting of the presidents of bishops’ conferences around the world, which is slated to take place later this week.

During his weekly Angelus address on February 17, the pope invited Catholics to pray for the four-day event, which he said he wanted to hold “as an act of strong pastoral responsibility before an urgent challenge of our time.”

The February 21-24 summit on the protection of minors in the Church will focus on the themes of responsibility, accountability, and transparency of bishops. It will also include testimony of victims of abuse, Mass, and a penitential liturgy.