At dawn, pilgrims from around the world, some of them barefoot, climbed a hill above Medjugorje where six children claimed they saw visions of the Virgin Mary in June 1981.
In the village, the pilgrims attended an open-air Mass. Some of them walked on their knees around a statue of the Virgin Mary.
The Medjugorje apparition has been disputed for decades. Unlike Fatima in Portugal or Lourdes in France, the Vatican has not recognized the sightings as authentic and has not formally approved Medjugorje as a shrine site.
Last year, however, it started formally investigating the apparitions that the six claim still occur regularly.
Despite the Vatican's stance, Medjugorje has thrived, becoming one of the wealthiest towns in Bosnia.
Pilgrims never stopped coming, even during the 1992-95 Bosnian war, when heavy fighting between Bosnia's Muslims and Croats raged in nearby Mostar.
-- Nedim Dervisbegovic
WATCH -- A photo gallery of images from Medjugorje: