Prior to Francis, the last pope we had from a religious order (as opposed to a career diocesan) was Gregory XVI in 1831. Now we've had two religious popes in a row --- Francis, a Jesuit, and then Leo, an Augustinian.
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Aren't they all religious? That seems like a mandatory part of being a pope.
Religious in this context means "of a religious order" instead of "diocesan". Not the general sense of the word "believes in religion" or similar.