Workers clean the interior of the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

A member of Egyptian Army walks in the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019

Workers add the finishing touches in the interior of the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

A member of Egyptian Army walks outside the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019.

Workers clean the interior of the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

Laborers complete work at the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

Members of Egyptian Army walk in the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019.

A member of Egyptian Army is seen cleaning at the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019.

Workers clean the interior of the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

Workers add the finishing touches in the interior of the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

Mohamed Abd El Hamied, 38, adds the finishing touches on the chair of Egyptian Coptic Pope Tawadros II, at new Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

Workers clean the interior of the new Coptic Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019. Picture taken January 3, 2019.

Workers add the finishing touches inside the new Cathedral "The Nativity of Christ" before Sunday's Coptic Christmas Eve Mass in the New Administrative Capital (NAC) east of Cairo, Egypt January 3, 2019