Why is the reign of Pericles called the flourishing of culture in Athens?

In general, the reign of Pericles caused not only the flourishing of culture, but also the flourishing of the economic and the flourishing of the state. Pericles was a very wise and skillful ruler. For him, Athens was a prosperous city, and the military power of the polis also largely hung. In terms of culture, it should be noted that during his reign, beautiful statues and temples were erected in the Acropolis, which were covered with gold.