In the middle of the 7th century BC, aristocracy polity ended, and tyranny was established, with Kypselos as the first tyrant. Periandros, who got described as one of the seven sages of the Archaic period, succeeded Kypselos,
Periandros got succeeded by his nephew Psammitichos, who got assassinated after three years, and the aristocracy system got restored.
At the end of the Archaic Period, several big projects took place in Corinth, but also in the colonies since the trireme, the warship that gave Hellenism the sovereignty of the seas and which was the culmination, was built for the first time by Bacchiades Amenoklis of the technology developed by the ancient Corinthians.