In 1902 the first missionaries that is two priests namely Tommaso Gays, 31 years and Filippo Perlo, 29 years plus two brothers that is Luigi Falda, 19 years and Celeste Lusso, 18 years were sent to the missions from Italy and they landed in Kenya and started their first evangelization activity in Central province at a place called Tuthu which is within the present Muranga Catholic Diocese. Pope Pius X on 6th July 1909 elevated this independent mission to the status of apostolic vicariate and Fr. Philipo Perlo was consecrated as Episcopal vicar on 23rd October 1909. He later founded the local congregation of the Sisters of Mary Immaculate of Nyeri.
The success of early missionary activity has facilitated the missionary evangelization of non-Christians to be currently carried out in the continent of Africa – Kenya, Uganda, Congo, Ivory Coast, Ethiopia, Mozambique, Tanzania, South Africa, Somalia, Djibouti, and Guinea Bissau. In Europe we are in Italy, England, Spain, Portugal and Poland. In Asia we are in South Korea and Mongolia. In South America we are in Argentina, Brazil, Colombia, Ecuador, Peru, Venezuela and Mexico. We are also in the United States of America and Canada.