Egyptian officials attend the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

Coptic Pope Tawadros II, center, walks down the aisle during the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

Egyptian Coptic Christians use their mobile phones to take photos and videos of Coptic Pope Tawadros II, during the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

An Egyptian Coptic Christian woman prays during the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

Coptic Pope Tawadros II, center, prepares the sacraments during Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

Coptic Pope Tawadros II, center, stands during the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

Coptic Pope Tawadros II, head of the Coptic Orthodox church, carries a censer of burning incense as he takes part in a ritual as part of a Coptic Orthodox Easter mass at the main cathedral in Cairo April 11, 2015 (Photo: Reuters)

Pope Tawadros II, the 118th Pope of the Coptic Orthodox Church of Alexandria and Patriarch of the See of St. Mark Cathedral, leads the Coptic Christmas Eve Mass in Cairo April 11, 2015 (Photo: Reuters)

Egyptian Coptic Christians greet and take pictures of Coptic Pope Tawadros II (C), head of the Coptic Orthodox church, as he arrives to celebrate a Coptic Orthodox Easter mass at Cairo's main cathedral in Cairo April 11, 2015 (Photo: Reuters)

Coptic Christians head to the main cathedral for Easter mass in Cairo April 11, 2015 (Photo: Reuters)

Members of the Ethiopian and Eritrean Orthodox churches attend the Easter mass led by Pope Tawadros II, the 118th Pope of the Coptic Orthodox Church of Alexandria, at the main Coptic Cathedral of Saint Marcos in Cairo April 11, 2015 (Photo: Reuters)

Coptic Pope Tawadros II, left, sits on the throne of Mar Morqos, during the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)

Coptic Pope Tawadros II, left, sits on the throne of Mar Morqos, during the Easter Eve service at St. Mark's Cathedral, in Cairo, Egypt, Saturday, April 11, 2015 (Photo: AP)