Đàng Trong
The first Catholic missionaries visited Vietnam from Portugal and Spain in the 16th century. The earliest missions did not bring very impressive results. Only after the arrival of Jesuits in the first decades of the 17th century did Christianity begin to establish its positions within the local populations in both regions of "Đàng Ngoài" (Tonkin) and "Đàng Trong" (Cochinchina). These missionaries were mainly Italians, Portuguese, and Japanese. Two priests, Francesco Buzomi 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.