Blessed Teresa of Calcutta (1910-1997), best known as Mother Teresa, was a Catholic nun known for her work caring for the poorest of the poor in the slums of India. She was born in Albania, and joined the Sisters of Loreto as a missionary at the age of 18. She became a nun in 1937, while teaching at a religious school in Calcutta. She began her work with the poor in Calcutta in 1948. In 1950, she founded the Missionaries of Charity, which presently has 4,500 sisters and is active in more than 100 countries. Mother Teresa came to international attention with the 1969 documentary, Something Beautiful for God. In 1979, she received the Nobel Peace Prize for her inspiring work with the poor.