Mother Teresa, the Roman Catholic nun known for her charity work with the impoverished in the Indian city of Calcutta, is to be welcomed into sainthood on September 4, Pope Francis confirmed. The Indian nun was once a recipient of the Nobel Peace Prize and founder of a sisterhood that ran 19 homes.

She passed away in 1997 at the age of 87. She was then beatified in 2003 which, was the first step to becoming a saint. The Pope announced her entry into sainthood in 2015 by pointing to a second miracle related to the nun, The Huffington Post reported.

Mother Teresa was born in 1910 to Albanian parents and came of age in what is now known as the Macedonian capital, Skopje. It was then under the Ottoman Empire. At the age of 19, she served under the Irish order of Loreto. In 1929, she was assigned to India.

During her stay, she went by the name of Therese and became a teacher for a school in Darjeeling. In 1946, she was stationed in Calcutta to aid the sick. After a decade, she set up a home for the abandoned children, as well as a hospice.

Five years after her death, Pope Francis recognized that the recovery of a Bengali woman named Monica Besra from her severe abdominal tumor was the result of Mother Teresa’s holy intervention. A Vatican commission had dubbed her recovery as being a miracle after the Missionaries of Charity claimed that the woman was cured by placing a photo of the nun on her stomach. However, the finding was criticised as untrue by various Bengali nationalist groups, Christian Today reported.

Mother Teresa garnered global acclaim for her service in the Kolkata slums, but many critics have also accused the nun of implementing extreme Catholicism, cohorting with dictators and receiving money from them to fund her charity work.