St. Mary's Church is a Roman Catholic church located at 12 Ross Road, Stanley, Falkland Islands. 
The church is the only pro-cathedral and parish of the Apostolic Prefecture of the Falkland Islands, an isolated territorial jurisdiction of the Catholic Church directly dependent on the Holy See.
It is the only Catholic church in the islands. It is made of wood and was consecrated in 1899. On the West wall it has oil murals, illustrated by British artist James Peck, born in the islands.
In September 1966, the hijackers of Aerolíneas Argentinas Flight 648 were granted sanctuary in the church by Father Rodolfo Roel (of Dutch origin) whilst they awaited deportation back to Argentina for trial.
During the Falklands War in 1982, the parish priest Michael McPartland negotiated with the Argentine troops to continue holding mass in English.
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