Mother Teresa was born Agnes Gonxha Bojaxhiu in Skopje, Macedonia, on August 27, 1910, of Albanian descent. At the age of 12 she felt called by God to be a missionary. She became a nun at 21 after three years in a convent in Ireland, and went to teach at St. Mary's High School in Calcutta. She never saw her mother and sister again. She was affected her so deeply by the misery and poverty she glimpsed outside the convent walls that in 1948 she received permission to leave the convent school and dedicate herself to working among the penniless, destitute and dying in the slums of Calcutta. Although she had no funds, she started an open-air school for slum children, and her life's work began. In 1950 she started her own order "The Missionaries of Charity", which became an International Religious Family by a decree of Pope Paul VI in 1965. And she was awarded the Nobel Peace Prize in 1979.