What Hera says may be historically correct. It seems like the earliest temples in Archaic Greece were dedicated to her. Her earliest sanctuary was the Heraion of Samos which seems to date back to the Geometric period. Other important early sanctuaries were the ones in Argos and Olympia. Hera was a very important goddess to the ancient Greeks, despite the fact that her most common role in the myths is that of the jealous wife.