She started two hospitals and a soup kitchen in Wellington, and wrote books in French, English and Maori.
Mother Aubert's canonisation - the lengthy process the Catholic Church goes through to declare someone a saint - formally began in 2007 with the appointment of Catholic priest and historian Maurice Carmody as postulator, or advocate for Mother Aubert's cause. Father Carmody wrote the Positio, a 1000-page document that outlined biographical details about Mother Aubert, as well as her relevance in her own time and today.
"The Positio has just been approved by six international historians in Rome, and it's currently before a panel of theologians to be investigated," Father Carmody told the Chronicle.
If it is approved by the theologians, Mother Aubert will become a venerable, Father Carmody said.
"This is the first major step toward canonisation. To be declared a saint, it must be proved that she performed a miracle, and receive the approval of the Pope."
Father Carmody said it would be "a big thing" for New Zealand Catholics to have their own saint and that Mother Aubert was a deserving candidate.
"Not only was she an ideal Christian woman, she was also a great contributor to New Zealand."