The power of history
"The choice of Athens as capital [of newly independent Greece], a town dominated by the imposing ruins of the Parthenon and with its associations with the glories of the Periclean age but in the early 1830s little more than a dusty village, symbolised the cultural orientation of the new state towards the classical past."
A Concise History of Greece
In 1834, Athens and Sparta were roughly the same size. Today, Athens is the center of a metropolis of three million people, while Sparta is a provincial town of 16,000.
Athens should be a larger and more important city today than Sparta: It is more centrally located, and is connected to an excellent port.
But Athens is a metropolis not because of its location or its port, but because a group of 19th-century Greeks and Western Philhellenes believed passionately that the Athenians of 2300 years before had been right, and the Spartans wrong.
The power of history.