Argentia (/ɑːrˈdʒɛntʃə/ ar-JEN-chə) is a Canadian commercial seaport and industrial park located in the Town of Placentia, Newfoundland and Labrador. It is situated on the southwest coast of the Avalon Peninsula and defined by a triangular shaped headland which reaches northward out into Placentia Bay creating a natural harbour 3 km (1.9 mi) in length. The first church and school were established by Father Pelagius Nowlan in 1835. He was from Ireland and moved to Newfoundland as a missionary priest. In 1836, population was made up 484 people in 76 houses.