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In page Pope Pius IX:

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Pius blessed Maximilian and his wife Charlotte of Belgium before they set off for Mexico to begin their reign.[5] But the friction between the Vatican and Mexico would continue with the new emperor when Maximilian insisted on freedom of religion, which Pius opposed. Relations with the Vatican would only be resumed when Maximilian sent the recently converted American Catholic priest Father Agustin Fischer to Rome as his envoy.[citation needed]