 Two priests and Diogo Carvalho established the first Catholic community in Hội An in 1615.Between 1627–30, Avignonese Alexandre de Rhodes and Portuguese Pero Marques converted more than 6,000 people in Tonkin.In the 17th century, Jesuit missionaries including Francisco de Pina, Gaspar do Amaral, Antonio Barbosa, and de Rhodes developed an alphabet for the Vietnamese language, using the Latin script with added diacritic marks.