What was the religious order that strengthened the catholic church and slowed the spread of protestantism?

Religious order that strengthened the Catholic Church and slowed the spread of Protestantism was the Jesuit order. The Jesuit order was formed in XVI century, Spain, by Ignatius de Loyola. They have played an important role in the Counter-Reformation with their educational, missionary, and charitable works all over Europe. They succeeded in converting many people around the world to Catholicism.