Located on the isthmus that connects mainland Greece to the Peloponnese, Corinth was surrounded by fertile plains and blessed with natural springs. It was an important city in Greek, Hellenistic and Roman times. Its location between the two seas of the Aegean Sea and the Gulf of Corinth, its proximity to the Mediterranean Sea and its strategic location made it an important commercial hub for both Athens and Corinth. It was often the bitter economic rivalry between Corinth and Athens that would trigger a crisis in Greek politics for the next 200 years. Athens overtook Corinth as the largest city of its time in terms of population and trade, but we will examine this in more detail in a later article in this series of articles on the history of Corinth.

Since the succession of Alexander the Great, Greece has been a disputed territory between Athens and Corinth. Corinth was occasionally the scene of civil wars between the Macedonians and Macedonians - the Antigonians - and between Corinth and Athens during the Greek Civil War.

Corinth was also busy with the Spartan expansion into Greece and Asia Minor and formed alliances with Argos, Boeotia, Thebes and Athens to fight against Sparta during the Corinthian wars of 395 - 386 BC. Corinth sided with Spartans in the Peloponnesian War and kept Athens from taking control of Syracuse, Corinth's main colony. After Athens was razed to the ground and Corinth was contested a second time by Austerity, it joined Athens, Argos and Thebeas against Athens. During the war, in which Athens and Corinthians were at odds, Corinth also joined an alliance against Argos and Boeotia against Athenians and against Greece, but did not join them in the fight against Sparta.

The destruction of ancient Corinth marked the end of a free Greece and Corinth was recognised as a great military and naval power that played an integral role in Hellas and in the way Athens and Sparta did. The castle was built in the early 6th century BC and was an important fortified fortress for the Hellenes after the Greek War of Independence of 1821-1829.

Corinth was a city like any other Greek city, it was one of the most important cities - states that, besides Sparta and Athens, were gaining in value.

Despite its height, Corinth is considered one of the most important cities of ancient times and perhaps the largest city in Greece. The city was decorated with a large number of temples, temples of various kinds, and temples for the gods and goddesses of Greece and the Mediterranean.

Corinth also fought in the Persian War (499 - 448 BC) along with other Greek city states and was an important participant in sending 400 soldiers to Thermopylae. Corinth was also known as the birthplace of the warship, which according to the Greek historian Thucydide became the standard theme of the Mediterranean powers for generations. In the first Greek naval battle in history, which is known today, Corinth and Kerkyra clashed 4,000 years ago. During the war Corinth made an alliance with Athens, in which Corinth offered its services, for which only one of the ancient Greek islands could face the Athenians.

The Corinth Channel, which carried shipping traffic from the western Mediterranean to the Aegean, could cut through the Corinth Isthmus, a narrow strip of land that connected central Greece and the Peloponnese, effectively transforming the former islands into a channel between the eastern and western parts of the Mediterranean. The Greek mainland, which was connected by a route along the "Isth Musen" (Corinth), which gave the ships a route between them. The Corinth Channel was named after the Greek city of Corinth, which was the closest town to the isthmus. In addition to the connection between the Saronic Gulf and the Corinthian Gulf, it also consisted of a "Corinthian Strait," a stretch of water from which the Peloponnese peninsula was connected to the Greek mainland by the "Greek mainland."

The Corinth Channel was a very important navigation route that connected the Gulf of Corinth and the Saronic Gulf with the Greek Archipelago. The Corinth Channel was the only means of separating the Peloponnese from the Greek mainland and making the peninsula an island. Ancient Corinth, which was located on the isthmus of Corinth, a narrow strip of land that connected the mainland of Athens with its southernmost island, Corinthian, was positioned so that the Corinthians could become masters of their trade. Hellenic hip, separated by the "Corinthian Strait" (Gulf of Corinth) and a waterway from the Mediterranean, and it served as the narrowest and most direct route between the two islands and also separated them from each other. The fact that it was called an isthmus means that it is supposed to be a "neck" of countries, due to its proximity to both southern and western Greece.