Đàng Trong
Borri's family was one of good standing in Milan. He became a member of the Society of Jesus, 16 September 1601; in 1616 he was sent from Macau with the Jesuit priest Marquez, as one of the first missionaries to Đàng Trong (knowns to the Europeans as "Cocincina", now part of central Vietnam). He stayed at Hội An from 1618 (or at the end of 1617) until 1622, being known under the name of Bruno.