Nisaea

thumb|This map depicts the long walls which connected Nisaea to the ancient City State of Megara.

Nisaea or Nisaia ( or Νισαία) was the Saronic port town of the ancient polis Megara. In Greek mythology, Nisaea was founded by one of Pandion II's sons, Nisos, who named the region given to him by his father Nisaea, after himself. Control of Nisaea slipped back and forth between Athens and Megara both before and during the Peloponessian War. Athenian allies of the Megarians built long walls which connected Nisaea to Megaris. According to Thucydides, the length of the walls that connected the port to Megara were eight Greek stadia, while Strabo claims the walls to have been 18 stadia in length. A temple of Demeter was located on the road near Nisaea, and a temple of Poseidon located within the port town. Nisaean Megara is thought to have been the birthplace of poet Theognis, but his birthplace is not known for certain The location of the ancient port town remains in debate by historians.