Saint-Paul is the second-largest commune in the French overseas department of Réunion. It is located on the extreme west side of the i…Saint-Paul is the second-largest commune in the French overseas department of Réunion. It is located on the extreme west side of the island of Réunion. Saint-Paul was the capital of the island from its settlement in the early 16th century, until Saint-Denis took over that role in 1738.