Anglican churches were established in Argentina, where the religion is otherwise overwhelmingly Roman Catholic, in the early 19th century to give a chaplaincy service to expatriate workers living in Argentina. In 1824 permission was given to hold Anglican church services, and in 1831 St. John's Church was built in San Nicolás, Buenos Aires on land donated in 1830 by Governor Juan Manuel de Rosas for the benefit of the new St. John the Baptist Anglican Church. It is the oldest in existence in Buenos Aires.