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St. Francis of Assisi - The Franciscan rule of St. Francis of Assisi

Which pope approved the final Franciscan rule in 1223?

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Bonaventura Berlinghieri: St. Francis and Scenes from His Life — St. Francis of Assisi St. Francis and Scenes from His Life, tempera on panel by Bonaventura Berlinghieri, 1235; in the Church of San Francesco, Pescia, Italy.

The final Franciscan rule, known as the Regula bullata or "Rule with a Bull," was approved by Pope Honorius III on November 29, 1223, through the papal bull Solet annuere.1