Pope Francis declared Mother Teresa a saint on Sunday before a crowd of more than 100,000 in St. Peter’s Square. Hundreds of people came to offer prayers at the Missionaries of Charity’s headquarters in Kolkata, India.

Two apparent cures of sick people after Mother Teresa’s death in 1997 have been attributed to her intercession.

In India, a special Mass was celebrated at the Missionaries of Charity, the order she founded in Kolkata.

Pope Francis responded: “We declare and define Blessed Teresa of Calcutta to be a saint and we enrol her among the saints, decreeing that she is to be venerated as such by the whole Church.”

The Pope said Mother Teresa had spent her life “bowing down before those who were spent, left to die on the side of the road, seeing in them their God-given dignity”.

He added: “She made her voice heard before the powers of the world, so that they might recognise their guilt for the crimes of poverty they themselves created.” He then repeated: “The crimes of poverty they themselves created.”

Teresa was born an ethnic Albanian, and the Albanian flag was much in evidence, as was the distinctive white habit, trimmed with blue stripes, worn by the nuns of her order, the Missionaries of Charity.

Born in 1910 to ethnic Albanian parents, Agnese Gonxha Bojaxhiu grew up in what is now the Macedonian capital, Skopje, but was then part of the Ottoman Empire.

Aged 19, she joined the Irish order of Loreto and in 1929 was sent to India, where she taught at a school in Darjeeling under the name of Therese.

In 1946, she moved to Kolkata to help the destitute and, after a decade, set up a hospice and a home for abandoned children.

She founded the Missionaries of Charity in 1950. The sisterhood now has 4,500 nuns worldwide.