The Latest on the canonization of Mother Teresa (all times local):

8:25 a.m.

Pope Francis is following in the footsteps of Mother Teresa by offering some 1,500 homeless people a pizza lunch at the Vatican after her canonization Mass.

The homeless, most of who live in shelters run by Mother Teresa's Sisters of Charity order, came to Rome overnight on buses from across Italy to take part in Sunday's Mass. They're getting seats of honor for the celebration and will then be served lunch in the lobby of the Vatican auditorium.

A Neapolitan pizza maker brought 20 people and three pizza ovens to cook the lunch, which will be served to the guests by some 250 sisters and priests of the Sisters of Charity order.

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7:20 a.m.

Thousands of pilgrims are thronging to St. Peter's Square for the canonization of Mother Teresa, the tiny nun who cared for the world's most unwanted and became the icon of a Catholic Church that goes to the peripheries to find lost, wounded souls.

Pope Francis is declaring Mother Teresa a saint at a Sunday morning Mass, making her the model of his Jubilee Year of Mercy and in some ways his entire papacy. For Francis, Mother Teresa put into action his ideal for the church to be a merciful "field hospital" for the poorest of the poor — both materially and spiritually.

Throughout the night, pilgrims prayed at vigils in area churches and flocked before dawn to the Vatican under heavy security to try to get a good spot for the Mass that was expected to draw more than 100,000 people.