(CNN) -- Pope Francis arrived in Seoul Thursday, marking the first papal visit to the country in 25 years.
The historic visit is also a nod to Catholicism's shifting demographics as an increasing number of believers come from Latin America, Africa and Asia instead of its historic stronghold in Europe.
"The Pope's visit to South Korea is the first part of a very intelligent opening to Asia," said Lionel Jensen, associate professor of East Asian Languages and Cultures at the University of Notre Dame. "The Pope's presence is a powerful symbol of the Vatican's recognition that it is in Asia and Sub-Saharan Africa that the church is growing most prominently."
During his packed, five-day visit to South Korea, the Pope will beatify 124 Korean martyrs, help celebrate the 6th Asian Youth Day, which is a gathering of Asian Catholic youth, and hold Holy Mass for Peace and Reconciliation, expected to be aimed at prayers for peace, including South and North Korean relations.
North Korea fired three short-range projectiles into the sea east of the Korean peninsula, beginning about an hour before the Pope's landing in Seoul, the South Korean Defense Ministry said.
The Korean peninsula remains a divided one. One of the Pope's missions is to "go to Korea and pray for the reconciliation and peace," said Vatican spokesman, Padre Federico Lombardi.
Pope Francis is expected to meet South Korean president, Park Geun-hye, as well as hold Mass with family members of the victims of the sunken Sewol ferry and comfort women, who were forced to sexual slavery by the Japanese in World War II, in attendance.