Pɔlɔvɛ́si ya Kongó ebandisami na ba Lazariste ya Beljika. Sango Félix Dekempeneer, mobandisi wa mission ya Bikoro, akomi o Kongó o mobu 1925, mpo ya kolengele boyei bwa ba nyango ba Filles de la Charité. Mpe wana bamopesi mosala mwa bosangeli Nsango Elamu o etuka ya Bikoro. O ntango ena, mission ya Bikoro ezalaki na batu soko nkoto ntuku ibale, mpe mbele bakristu bobele nkoto yoko na ndambo to nkoto ibale. O mobu 1959, mission ya Bikoro ekomi Diocesi mpe Mgr Camille Vandekerkove, lazariste, akomaki Episkopo wa yambo ya Diocesi ena. Basango Lazaristes babandisi ba paroisse iye: Bikoro St. Vincent wa Paul (1926), Irebu Notre Dame du Chenal (1928), Lukolela Sacré-Coeur (1933), Bokongo Sainte Famille (1936), Yumbi Christ-Roi (1938), [[Bolobo Notre Dame (1946), Itipo Santu Yozefu (1948), Iboko Notre Dame de la Médaille Miraculeuse (1956), Mooto Saint Emille (1962), mpe Momboyo Martyrs ya Uganda (1963).