Saint Francis Xavier, born Francisco de Jasso y Azpilicueta (7 April 1506, Javier, Navarre – 3 December 1552, Shangchuan Island, China) is a pioneering Roman Catholic missionary born in the Kingdom of Navarre (Spain) and co-founder of the Society of Jesus.

He is a student of Saint Ignatius Loyola and one of the first seven Jesuits who dedicate themselves to the service of God at Montmartre in 1534.

He lead an extensive mission into Asia, mainly in the Asian Portuguese Empire of the time.

He is influential in the spreading and upkeep of Catholicism most notably in India, but also ventures into Japan, Borneo, the Moluccas, and other areas which had thus far not been visited by Christian missionaries.

In these areas, being a pioneer and struggling to learn the local language of the indigenous people in the face of opposition, he has less success.