Pope Francis attends a meeting with the world of labour at Bachilleres College in Ciudad Juarez, Mexico, Feb. 17, 2016.

Inmates look on during the visit of Pope Francis to the CeReSo n. 3 penitentiary in Ciudad Juarez, Mexico, Feb.17, 2016.

Choir girls walk to the entrance of the Benito Juarez International Airport to greet Pope Francis when he arrives in Ciudad Juarez, Mexico, Feb. 17, 2016.

Mariachis perform as they say goodbye to Pope Francis at the Benito Juarez International Airport in Mexico City, Mexico, Feb. 17, 2016.

Nuns wait for the arrival of Pope Francis at the Venustiano Carranza stadium in Morelia, Michoacan State, Mexico, Feb. 16, 2016.

A woman waits for the arrival of Pope Francis at Francisco J. Mujica airport in Morelia, Michoacan State, Mexico, Feb. 16, 2016.

Pope Francis arrives for Mass in a golf cart at Venustiano Carranza stadium in Morelia, Mexico, Feb. 16, 2016.

A group of priests attend Mass with Pope Francis at the Venustiano Carranza stadium in Morelia, Michoacan State, Mexico, Feb. 16, 2016.

Pope Francis arrives to celebrate Mass at Venustiano Carranza Stadium in Morelia, Feb. 16, 2016.

A marching band of nuns from Monterrey play their instruments as they spontaneously parade on the eve of Pope Francis' arrival, in Morelia, in the Mexican state of Michoacan, Feb. 15, 2016.

Girls chase pigeons in the Zocalo, or central square, in Morelia, Michoacan state, Mexico, Feb. 15, 2016. On his one-day trip to the capital of Michoacan state, Pope Francis will visit the cathedral, meet with youth, and celebrate Mass with priests and seminarians, and religious men and women.

Pope Francis waves upon his arrival at the airport in Tuxtla Gutierrez, Mexico, Feb. 15, 2016. Francis is celebrating Mexico's Indians on Monday with a visit to Chiapas state, a center of indigenous culture, where he will preside over a Mass in three native languages.

An indigenous woman holding a Vatican flag uses her traditionally embroidered shawl to shade herself during Mass with Pope Francis in San Cristobal de las Casas, Mexico, Feb. 15, 2016.

A girl peeks from behind public telephone booths with photographs of Pope Francis in Tuxtla Gutierrez, Mexico, Feb. 15, 2016.

Pope Francis kisses a baby from his popemobile in San Cristobal de las Casas, Mexico, Feb. 15, 2016.

Pope Francis officiates an open-air mass in San Cristobal de las Casas, in Chiapas, on Feb. 15, 2016. Thousands of indigenous Mexicans flocked to a field in the impoverished southern state of Chiapas to attend Pope Francis' mass in three native languages.

Women from Mexquititlan wait in the early morning fog to enter the site where Pope Francis will celebrate Mass during his one-day visit in San Cristobal de las Casas, Mexico, on Feb. 15, 2016.

Pope Francis blesses a picture of a child during his visit to the Federico Gomez Pediatric Hospital, in Mexico City, Feb. 14, 2016.

Pope Francis greets the crowd on his way to celebrate mass at the Guadalupe's basilica in Mexico City, Feb. 13, 2016.

People hold pictures of Pope Francis framed in the the shape of a dove, as they wait for him to drive by on the popemobile in Mexico City, Feb. 14, 2016.

People wait for the arrival of Pope Francis in Ecatepec, Mexico, Feb. 14, 2016.

Thousands of faithful wait for the start of a mass led by Pope Francis at High Studies Center of municipality of Ecatepec, Mexico, Feb. 14, 2016.

Pope Francis is seen praying in front of the image of Our Lady of Guadalupe while celebrating mass at the Basilica of Guadalupe in Mexico City, Feb. 13, 2016.

Pope Francis prays in front of the image of the Virgin of Guadalupe during the celebration of a mass at the Basilica of Guadalupe, in Mexico City, Feb. 13, 2016.

Prelates wait for the arrival of Pope Francis who will celebrate Mass at the Basilica of the Virgin of Guadalupe in Mexico City, Feb. 13, 2016.

Pope Francis enters, clutching his pastoral staff, the Basilica of the Virgin of Guadalupe in Mexico City, Feb. 13, 2016.

Pope Francis waves to the crowd from the popemobile in Zocalo Square in Mexico City, Feb. 13, 2016.

A woman waves a blanket decorated with an image of Pope Francis along the route the pontiff will take upon arrival to Mexico City, Feb. 12, 2016.

Pope Francis poses with Mexico's President Enrique Pena Nieto, right, and first lady Angelica Rivera upon his arrival to the Benito Juarez International Airport in Mexico City, Feb. 12, 2016.

Pope Francis wears a traditional Mexican sombrero hat as Mexico's President Enrique Pena Nieto, right, and first lady Angelica Rivera applaud, upon his arrival to the Benito Juarez International Airport in Mexico City, Feb. 12, 2016.

A man walks past a payphone displaying an image of Pope Francis, in Mexico City on Feb. 12, 2016.

The Zocalo square in Mexico City, shown Feb. 12, 2016, where Pope Francis is expected to arrive later today.

Pope Francis puts on a traditional Mexican sombrero hat received as a gift by a Mexican journalist on Feb. 12, 2016, aboard the plane to Havana, Cuba. The Pope will also visit Mexico on this trip.

Pope Francis boards a plane at Fiumicino Airport in Rome, Italy Feb. 12, 2016 as he begins his trip to Cuba and Mexico. In Cuba he will hold a historic meeting with the leader of the Russian Orthodox church Patriarch Kirill.

Baker Oliverio Cruz Gutierrez shows part of his production with images of Pope Francis at his bakery in Morelia, Michoacan State, on Feb. 10, 2016. The Pope will visit this area during his trip to Mexico.

An image of Pope Francis and the Virgin of Guadalupe for sale at a store in Mexico City on Feb. 10, 2016. Pope Francis will visit four Mexican states from Feb.12 to Feb. 17.

View of printed masks of Pope Francis for sale at a store in Mexico City on Feb.10, 2016.