Mother Teresa of Calcutta, a nun who dedicated her life to helping the poor, will be made a saint of the Roman Catholic Church at a Vatican ceremony on September 4th.

Pope Francis cleared the way for sainthood for her last December. Teresa’s compassion reached out to slum-dwellers, famine sufferers and AIDS victims, and won her the Nobel Peace Prize in 1979.

Born in Yugoslavia in 1910, Teresa traveled to India at age 18 and taught geography at a convent school. Twenty years later she opened her first school in the Calcutta slums.

She was honored by many world and religious leaders including the Pope, Indian Premiers Indira Gandhi and Narasimha Rao, and British Queen Elizabeth II.