Mata'afa Faumuina Fiame Mulinu'u I  Mata'afa Faumuina Fiame Mulinu'u I (died 27 March 1948) was a high chief of Samoa and a leader of the country's pro-independence Mau movement during the early 1900s. He was the holder of high-ranking "ali'i" chiefly titles, Mata'afa, Fiame from Lotofaga and Faumuina from Lepea. Mulinu'u was a civil servant, rising to the position of Inspector of Police. He became the President of the Mau following the death of high chief and leader Tupua Tamasese Lealofi III in 1929. He was one of the wounded during a peaceful Mau procession in the capital Apia on 28 December 1929 when New Zealand police fired into the crowd and resulting in a day of violence that saw up to 11 Samoans and a New Zealand constable killed. The date is referred to as Black Saturday in Samoa's history. In March 1939 he succeeded Salanoa Muliufi as Mata'afa following a hearing by the Samoan Land and Titles Commission. In 1944 he became the third Fautua. He died at his home in Lepea on 27 March 1948 at the age of 58, and was subsequently given a state funeral. His wife Fa'amusami, was the daughter of paramount chief Malietoa Laupepa. His son, Fiame Mata'afa Faumuina Mulinu'u II (1921–1975) became the first Prime Minister of Western Samoa at the country's independence from New Zealand colonial administration. His granddaughter, Fiame Naomi Mata'afa is a high-ranking chief and a long serving cabinet minister in the Samoan government.