It was a group of 45 Anglican and Roman Catholic martyrs who were executed during the persecution of Christians under Mwanga, kabaka of Buganda from 1885 to 1887. The  African Roman Catholic martyrs were collectively beatified by Pope Benedict XV in 1920 and canonized by Pope Paul VI on October 18, 1964. Their feast day is June 3.

The first Roman Catholic missions to Bantu-speaking Africa were established by the White Fathers Mission in 1879. Christians were tolerated by the kabaka Mutesa I, but his successor, Mwanga, launched a campaign against them. Mwanga massacred the Anglican missionary bishop James Hannington and his colleagues in October 1885. Joseph Mukasa, an important member of the royal household and a Catholic, reproached the kabaka for the massacre, and, on November 15 of that year, Mwanga had Mukasa beheaded.

The Christian pages under Mukasa’s guidance became the next victims. Mwanga, having learned that they had received religious instruction from the page Denis Ssebuggwawo, ordered that all the youths be arrested. Charles Lwanga, Mukasa’s successor, then secretly baptized those boys who had only been catechumens. The following day they were herded away to the village of Namugongo. Three of them—Pontian Ngondwe, a soldier, and the royal servants Athanasius Bazzekuketta and Gonzaga Gonza—were murdered en route. All the survivors, as recorded by Father Lourdel, superior of the Roman Catholic mission to Uganda, were imprisoned for a week. With the exception of Mbaga-Tuzinde, who was bludgeoned by his own father, the pages were burned alive on June 3, 1886: Ambrose Kibuka, Anatole Kiriggwajjo, Achilles Kiwanuka, Mugagga, Mukasa Kiriwawanvu, Adolphus Mukasa Ludigo, Gyavira, and Kizito. The soldiers and officials Bruno Serunkuma, James Buzabaliawo, and Luke Banabakintu were martyred with them.

Mwanga continued his persecution, destroying Protestant and Roman Catholic missionaries alike. Subsequent victims included Matthias Mulumba, assistant judge to a provincial chief; Andrew Kaggwa, chief of Kigowa; and Noe Mawaggali, a Roman Catholic leader. The page Jean Marie Muzeyi was beheaded on January 27, 1887.