Mother Theodore Guerin founder of the sisters of Provedence Named in 2006
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At Mass for the Seventh Sunday of Easter (May 12, 2013), Pope Francis canonized 800 Martyrs from the Italian city of Otranto, along with two Latin American religious Foundresses, Mother Laura Montoya e Upegui - the first Colombian saint - and Mother Maria Guadalupe Garcia Zavala, from Mexico.
Saint Joseph Vaz who was canonized by Pope Francis on January 14, 2015, at Galle Face Green, Colombo, Sri Lanka.
The most recent saint canonized by Pope Francis was Joseph Vaz who was elevated to the altars on January 14, 2015.
Juan Diego was canonized on July 31, 2002.
Saint John Paul II, who died in 2005, is the most recent living saint. He was just canonized in 2014.
There are several saints named Sergius so you need to be specific. Most were Precongregational Saints and never officially canonized. They were declared as saints by the early Christian community and not by the pope.
St. Andre Bessett was canonized on October 17, 2010, one of the six most recent saints.
Most recently St Elizabeth of the Trinity, canonized by Pope John Paul II.
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St. Thomas was one of the greatest and most influential theologians of all time. He was canonized in 1323 and declared Doctor of the Church by Pope Pius V.
Saint John was one of the twelve apostles of Jesus, and known to be the one most beloved by Christ. The apostles weren't canonized, but became saints, nonetheless. Therefore, there is no known date of when he became a saint.
The most recently beatified pope was Pope Paul VI who was beatified on October 19, 2014. Popes John XXIII and John Paul II were canonized on April 27, 2014.
The Catholic Church and most christians believe that purity is a virtue. Some Christians take purity pledges, like the Jonas brothers, who are not Catholic but are Christian. To be abstinent or to resist rape is considered virtuous. To encourage a respect for purity, the Catholic Church has canonized some young girls who resisted forcible intercourse. Maria Goretti was killed by an attacker and canonized around 1950. Her attacker, who had gone to prison and repented his sin/crime, was present in Rome for her canonization. Caroline was raped and killed by a Russian soldier in 1914. She is about to be canonized a saint for the same reason.