Catholic Answers Director of Apologetics Tim Staples explains when the Church began to canonize saints and why. See the tract linked above for more information.
Tim Staples is Director of Apologetics and Evangelization here at Catholic Answers, but he was not always Catholic. Tim was raised a Southern Baptist. Although he fell away from the faith of his childhood, Tim came back to faith in Christ during his late teen years through the witness of...
"Time is not our own, and we must give a strict account of it."
~ Toribio Mogrovejo, of noble birth, educated at the finest schools, law professor at the University of Salamanca, Spain; who became a tireless missionary, baptizing nearly 500,000 as Archbishop of Lima, including St. Rose of Lima, St. Francis Solano, and St. Martin of Porres. Canonized in 1726.