Ralph Ardito stands with a framed thank you letter from Mother Teresa on Friday at St. Mary's Church in Augusta. The soon-to-be saint wrote in 1978 to thank a local Knights of Columbus group for a $1,000 donation.

This Friday photo shows Mother Teresa' autograph on a framed letter at St. Mary's Church in Augusta.

This Friday photo shows a framed thank you letter from Mother Teresa at St. Mary's Church in Augusta.

The Rev. Frank Morin points out Mother Teresa's signature on a framed thank you letter on Friday at St. Mary's Church in Augusta.

Pope John Paul II, right, holds his arm around Mother Teresa as they ride in the popemobile outside the Home of the Dying in Calcutta, India, in this February 1986 photo. When Pope Francis canonizes Mother Teresa on Sunday, he'll be honoring a nun who won admirers around the world and a Nobel Peace Prize for her joy-filled dedication to the "poorest of the poor."

Nuns of Mother Teresa's Missionaries of Charity carry some of her relics during a vigil of prayer on Friday in preparation for the canonization of Mother Teresa in the St. John in Latheran Basilica at the Vatican.