People gather as they wait for Pope Francis' arrival in Baghdad, Iraq March 5, 2021. Vatican Media/Handout via REUTERS

Pope Francis attends an inter-religious prayer at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, in Ur near Nassiriya, Iraq March 6, 2021.

A banner showing a picture of Pope Francis at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021.

Pope Francis arrives to lead a mass at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021.

Pope Francis waves as he leaves after holding a mass at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021.

Pope Francis arrives to hold inter-religious meeting at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, in Ur near Nassiriya, Iraq March 6, 2021.

Members of Iraqi security forces stand guard near a poster of Pope Francis ahead of his arrival to the Syro-Catholic Cathedral of "Our Lady of Salvation'' in Baghdad, Iraq March 5, 2021.

Pope Francis and Iraqi President Barham Salih attend a welcoming ceremony at the Presidential Palace in Baghdad, during Pope's historic tour in Iraq, March 5, 2021.

Pope Francis disembarks a plane as he arrives at Baghdad International Airport where a welcoming ceremony is held to start his historic tour in Baghdad, Iraq, March 5, 2021.

Pope Francis shakes hands with an Iraqi offical, upon his arrival at Baghdad International Airport, in Baghdad, Iraq March 5, 2021. Iraqi Prime

Iraqi President Barham Salih and Pope Francis attend a welcoming ceremony at the Presidential Palace during the Pope's historic tour in Baghdad, Iraq, March 5, 2021, in this screen grab taken from video. Iraqiya TV/Reuters TV via REUTERS

Pope Francis leaves the Syro-Catholic Cathedral of "Our Lady of Salvation" after a visit in Baghdad, Iraq March 5, 2021 in this screen grab taken from video. Iraqiya TV/Reuters TV via REUTERS

A limousine carrying Pope Francis arrives at the Presidential Palace during his historic tour in Baghdad, Iraq, March 5, 2021, in this screen grab taken from video. Iraqiya TV/Reuters TV via REUTERS

Pope Francis waves to the crowd upon his arrival in Baghdad, Iraq March 5, 2021.

Pope Francis meets with with bishops, priests, seminarians and catechists at the Syro-Catholic Cathedral of 'Our Lady of Salvation' in Baghdad, Iraq March 5, 2021. Vatican Media/Handout via REUTERS

Iraqi Officials welcome Pope Francis at Baghdad International Airport, in Baghdad, Iraq March 5, 2021. Iraqi Prime Minister Media Office/Handout via REUTERS

General view of the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, in Ur near Nassiriya, Iraq, March 6, 2021 in this screen grab taken from video. Iraqiya TV/Reuters TV via REUTERS

A motorcade escorts Pope Francis during his historic tour in Baghdad, Iraq, March 5, 2021, in this screen grab taken from video. Iraqiya TV/Reuters TV via REUTERS

Pope Francis holds a Mass at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021. Vatican Media/Handout via REUTERS

Pope Francis arrives for his speech during a ceremony at the Presidential Palace in Baghdad, Iraq March 5, 2021.

Pope Francis meets young people of Scholas Occurrentes in Baghdad, Iraq March 5, 2021. Vatican Media/Handout via REUTERS

A motorcade leaves the Syro-Catholic Cathedral of 'Our Lady of Salvation' after Pope Francis' visit, in Baghdad, Iraq March 5, 2021. Vatican Media/Handout via REUTERS

Iraqi Prime Minister Mustafa Al-Kadhimi walks with Pope Francis upon his arrival at Baghdad International Airport, in Baghdad, Iraq March 5, 2021. Iraqi Prime Minister Media Office/Handout via REUTERS

Pope Francis visits the Syro-Catholic Cathedral of "Our Lady of Salvation" in Baghdad, Iraq March 5, 2021.

Iraq's President Barham Salih speaks with Pope Francis during a welcome ceremony, at the presidental palace in Baghdad, Iraq March 5, 2021.

Pope Francis visits the Syro-Catholic Cathedral of "Our Lady of Salvation" in Baghdad, Iraq March 5, 2021 in this screen grab taken from video. Iraqiya TV/Reuters TV via REUTERS

A shadow of a member of Iraqi security forces is seen on a wall before Pope Francis arrival to hold a Mass at Chaldean Cathedral of Saint Joseph in Baghdad, Iraq, March 6, 2021.

A man stands next a picture of Pope Francis at the Chaldean Cathedral of ''Saint Joseph'' in Baghdad, Iraq March 6, 2021.

A girl is carried after attending a mass led by Pope Francis at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021.

Pope Francis arrives to meet with Iraq's top Shi'ite cleric, Grand Ayatollah Ali al-Sistani, in Najaf, Iraq March 6, 2021. Vatican Media/­Handout via REUTERS

Pope Francis arrives to lead a mass at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021.

Pope Francis arrives to hold a Mass at the Chaldean Cathedral of "Saint Joseph" in Baghdad, Iraq March 6, 2021. Vatican Media/Handout via REUTERS

Pope Francis is received by Iraqi Prime Minister Mustafa Al-Kadhimi upon disembarking from his plane at Baghdad International Airport to start his historic tour in Baghdad, Iraq, March 5, 2021.