Tourists are seen at the archeological site Templo Mayor as it re-opens after almost a year of closures due to the coronavirus disease (COVID-19) pandemic, in Mexico City, Mexico April 28, 2021. REUTERS/Carlos Jasso

Tourists are seen at the archeological site Templo Mayor as it re-opens after almost a year of closures due to the coronavirus disease (COVID-19) pandemic, in Mexico City, Mexico April 28, 2021. REUTERS/Carlos Jasso

A visitor points at the archeological site, Templo Mayor as it re-opens after almost a year of closures due to the coronavirus disease (COVID-19) pandemic, in Mexico City, Mexico April 28, 2021. REUTERS/Carlos Jasso

A visitor is seen at the archeological site Templo Mayor as it re-opens after almost a year of closures due to due to the coronavirus disease (COVID-19) pandemic, in Mexico City, Mexico April 28, 2021. REUTERS/Carlos Jasso

A general view of the archeological site Templo Mayor as it re-opens after almost a year of closures due to the the coronavirus disease (COVID-19) pandemic, in Mexico City, Mexico April 28, 2021. REUTERS/Carlos Jasso

A tourist is seen at the archeological site Templo Mayor as it re-opens after almost a year of closures due to the coronavirus disease (COVID-19) pandemic, in Mexico City, Mexico April 28, 2021. REUTERS/Carlos Jasso

Undated image shows part in the archeological site of 110 tombs at the Nile Delta, in this image released on April 27, 2021 by archaeological mission operating in the archaeological area of Dakahlia Governorate north of Cairo, via Egypt's Ministry of Antiquities. The Egyptian Ministry of Antiquities/Handout via REUTERS ATTENTION EDITORS

People look at unearthed archeological findings at the site of the 'Lost Golden City', which was recently discovered by archaeologists, in the West Bank of Luxor, Upper Egypt, April 10, 2021. REUTERS/Amr Abdallah Dalsh

Men pray during the inter-religious prayer held by Pope Francis at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Yara Nardi

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

Pope Francis attends the 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. REUTERS/Yara Nardi

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

Pope Francis attends the 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. REUTERS/Yara Nardi

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

Pope Francis attends the 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. REUTERS/Yara Nardi

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. REUTERS/Thaier al-Sudani

Priests help Pope Francis after the 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. REUTERS/Yara Nardi

Pope Francis speaks during 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. REUTERS/Thaier al-Sudani

Pope Francis speaks during 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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

Pope Francis looks on as he 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. REUTERS/Thaier al-Sudani

Pope Francis speaks during 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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani

Pope Francis speaks during 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. REUTERS/Thaier al-Sudani

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. REUTERS/Thaier al-Sudani TPX IMAGES OF THE DAY

Pope Francis arrives to hold 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. REUTERS/Thaier al-Sudani

Pope Francis attends the 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. REUTERS/Yara Nardi

Pope Francis attends the 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. REUTERS/Yara Nardi

Pope Francis attends the 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. REUTERS/Yara Nardi

Pope Francis arrives in a limousine to hold 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. REUTERS/Yara Nardi

Pope Francis arrives to hold 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. REUTERS/Thaier al-Sudani

Pope Francis is welcomed as he arrives to hold 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. REUTERS/Yara Nardi

Pope Francis arrives to hold 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. REUTERS/Yara Nardi

Pope Francis arrives to hold 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. REUTERS/Thaier al-Sudani

Pope Francis is welcomed as he arrives to hold 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. REUTERS/Yara Nardi TPX IMAGES OF THE DAY

Pope Francis arrives to hold 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. REUTERS/Thaier al-Sudani

A general view shows the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of Pope Francis' arrival, in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Thaier al-Sudani

People walk at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of Pope Francis' arrival, in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Thaier al-Sudani

Clerics from Lebanon visit the archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of Pope Francis' arrival in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Yara Nardi

A cleric from Lebanon visits the archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of Pope Francis' arrival in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Yara Nardi

Clerics from Lebanon visit the archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of Pope Francis' arrival in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Yara Nardi

A cleric from Lebanon visits the archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of Pope Francis' arrival in Ur near Nassiriya, Iraq March 6, 2021. REUTERS/Yara Nardi

A guard inspects the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

Officials inspect the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

Officials inspect the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

A man works at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

A worker walks at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

A worker is seen at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjanii

A man walks at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

A general view of the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

A guard is seen at the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of Pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani

A general view of the ancient archeological site of Ur, traditionally believed to be the birthplace of Abraham, ahead of the planned visit of pope Francis, in Ur near Nassiriya, Iraq February 18, 2021. Picture taken February 18, 2021. REUTERS/Alaa Al-Marjani