VATICAN CITY (CNS) — In what Orthodox Ecumenical Patriarch Bartholomew of Constantinople described as a “brave and bold” gesture, Pope Francis gave the patriarch a famous reliquary containing bone fragments believed to belong to St. Peter.

The only time the bronze reliquary has been displayed publicly was in November 2013, when Pope Francis had it present for public veneration as he celebrated the closing Mass for the Year of Faith, opened by Pope Benedict XVI.

The bronze case contains nine of the bone fragments discovered during excavations of the necropolis under St. Peter’s Basilica that began in the 1940s.