This place is the site of an all-night religious festival to which Socrates is going when he gets waylaid and taken to Cephalus' house in Plato's Republic.  
It had three major parts, Munichia [moo-NIK-yuh], Zea [ZEE-uh] and Cantharus, the first two of which were exclusively military, while the last was mainly commercial.  It was designed by a man who was said to be the first non-statesman to speculate about the best form of government.  After being destroyed, it was rebuilt by a man who was coming off a big victory at Cnidus.  Its street plan was laid out by Hippodamus of Miletus, who may not have intended for it to contain a disproportionate number of its city's foreign residents.  This place is the site of an all-night religious festival to which Socrates is going when he gets waylaid and taken to Cephalus' house in Plato's Republic.  In 393 Conon undid the destruction by the Spartans from 10 years earlier and rebuilt Themistocles' long walls to, FTP, what triple harbor that was the main port of fifth-century Athens?
It had three major parts, Munichia [moo-NIK-yuh], Zea [ZEE-uh] and Cantharus, the first two of which were exclusively military, while the last was mainly commercial.  
Piraeus