She originally joined the Sisters of Loreto but later founded a new order called the Missinaries of Charity.
Blessed Mother Teresa of Calcutta and her order of nuns worked (and continue to work) with the poor and dying of India.
For over a period of 45 years she and the other nuns, looked after the poor, sick, orphaned and the destitute isn the city of Calcutta. They were called Sisters of Charity.
When Mother Teresa founded her Order, she started in the city of Calcutta.
Blessed Teresa of Calcutta, after she founded her Order, the Missionaries of Charity, started her work in Calcutta, and did most of her work in India, although by the time of her death, the Missionaries of Charity were world-wide, and Mother was at each of the houses when it began. She also spent a great deal of time traveling, but she will always be especially associated with India, which threw a state funeral for her, and with Calcutta especially.
The order, founded by Mother Teresa, work in over 100 countries around the world but are probably most active in India.
She began working with the Sisters of Loreto in 1929 but founded her own order, the Missionaries of Charity, which was approved by the Vatican in 1950.
Mother Teresa founded the Missionary Sisters of Charity. Actually, the Missionaries of Charity are not just sisters. The group also has priests, brothers and lay volunteers who are both Catholic and non Catholic.
She arrived in India in 1929, and began her novitiate in Darjeeling, near the Himalayan mountains, where she learned Bengali and taught at the St. Teresa's School, a schoolhouse close to her convent. She took her solemn vows on May 14, 1937, while serving as a teacher at the Loreto convent school in Entally, eastern Calcutta.
St. Teresa of Calcutta, also known as Mother Teresa was a Sister, she was never in a "nunnery". She was originally a Sister of Loretto, later she left to found the Missionaries of Charity and became the founding Mother Superior of that Order.
The order was founded in 1950 in Calcutta, India, by Mother Teresa.
Mother Theresa's funeral was held in St. Thomas Church in Calcutta. The funeral rites began with a military escort of 15 vehicles carrying her body on a gun carriage in a procession from St. Thomas to the stadium and then to a private burial at Mother House, the headquarters of the Missionaries of Charityreligious order founded by Mother Teresa.
When she died she had over 4000 sisters in her order.