A new 70-metre long church in Lausikula on the southern tip of Wallis was consecrated by Bishop Ghislain de Rasilly last month.
It is hoped that the church will help the territory become a pilgrimage site.
The relics of St Peter Chanel, who is the patron saint of Oceania, are preserved on the neighbouring island of Futuna.
The church cost an estimated four million US dollars to build and reports from Wallis and Futuna say there has been unease over the cost.
The Wallesian community in New Caledonia have made a significant contribution to the cost of the building.
It has been reported the fund raising has left many contributors in debt.
Look at photographs of the new church and of the dedication service
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