St. Mary's Cathedral is the Catholic cathedral of Nuku'alofa, set apart by its unusual mix of low baroque towers and a more modern central structure. It is not as famous as the royal sights in town, but it adds another layer to the capital's small collection of civic and religious landmarks.
The building is worth a short look if you are already exploring central Nuku'alofa, especially for the way older European church forms have been adapted to a Pacific island setting.