"We declare and define Blessed Teresa of Calcutta to be a Saint," the Pope said to a roar from the thousands gathered at St. Peter's Square here, including many Indians who held or waved the Indian flag. "We enrol her among the Saints, decreeing that she is to be venerated as such by the whole Church. In the name of the Father, and of the Son, and of the Holy Spirit," he said, making a long-awaited announcement. An estimated 120,000 people attended the Mass, according to the Vatican Press Office.Crowds flooded the Vatican to celebrate the highly anticipated canonization of Mother Teresa, an event which Catholics and non-Catholics alike had looked forward to since the nun's death in 1997.Many arrived before dawn to get a good spot for the ceremony, the Catholic News Agency reported.