Francis of Assisi

Giovanni di Pietro di Bernardone, OFM, better known as Francis of Assisi, was an Italian mystic and Catholic friar who founded the Franciscans. He was inspired to lead a life of poverty as an itinerant preacher. One of the most venerated figures in Christianity, Francis was canonized by Pope Gregory IX on 16 July 1228. He is usually depicted in a brown habit with a rope around his waist with three knots, symbolizing the three Franciscan vows of poverty, chastity, and obedience.

In 1219, he went to Egypt in an attempt to convert the sultan al-Kamil and put an end to the conflict of the Fifth Crusade. In 1223, he arranged for the first live nativity scene as part of the annual Christmas celebration in Greccio.

Source: Wikipedia