Today, Mother Teresa was made a saint by Pope Francis. He presided over her canonisation in Rome after a second miracle was attributed to her intervention last year.
The Vatican said the Congregation for the Causes of Saints and the Pope had recognised that a Brazilian man with multiple brain tumours was miraculously healed in 2008 after prayers for the intercession of Mother Teresa. She died in 1997 and has been on the "fast track" to sainthood since her beatification in 2003.
Known for a life of service to the poor, Mother Teresa won the Nobel Peace Prize for her mission in the slums of Mumbai and famously advocated for a Christianity that showed the love of Christ through practically serving the most vulnerable in society.
To celebrate her canonisation, here are 12 heart-warming photos that reveal a snapshot of her life and service:
Mother Teresa holds nine-month-old Christina Ott from Switzerland during a signing ceremony in Hong Kong January 16, 1985.
Mother Teresa presents documents for a new house to a villager from Latur in Bombay on September 26, 1994.
Mother Teresa attends to a patient in her home for the dying in Calcutta's teeming slum on February 2, 1986.
Mother Teresa blesses one week-old Dejen Abreha in the neo-natal intensive care unit at Saint Margaret's Center for Women and Infants, in Boston, June 15, 1995.
Mother Teresa greets journalists after arriving in Rome from New Delhi May 16, 1997.
Mother Teresa touches the protective window towards the face of a young child who was among the hundreds who came to greet her at the Quebec Airport, June 10, 1986.
Pope John Paul II holds hands with Mother Teresa after visiting the Casa del Cuore Puro, Mother Teresa's home for the destitute and dying in Calcutta, February 3, 1986.
Mother Teresa blesses reporters and photographers gathered in the courtyard of the headquarters of her Missionaries of Charity in the eastern Indian city of Calcutta, March 14, 1997.
Mother Teresa talking to a Bangladeshi man after she opens an old people's home at Bishia Kuribari village 31 miles from Dhaka April 21, 1995.
Mother Teresa prays at the St. Francis of Assisi's Church on January 14, 1985 in Hong Kong.
Mother Teresa blesses a catholic faithful outside Mary's Bascillica near Shanghai on October 23, 1993. Mother Teresa, during a five day visit to China, said she would like to open a mission to help the poor in Shanghai.
