Athens–Piraeus Electric Railways was under consideration that would have been built in two phases, reaching Nea Erithrea by the end of the first phase and Agios Stefanos by the end of the second phase. Due to lack of funding, this extension was canceled in 2011. Athens–Piraeus Electric Railways I.S.A.P. or Athens–Piraeus Electric Railways (, "Ilektrikoi Sidirodromoi Athinon-Pireos") was the oldest urban rapid transit system of Athens metropolitan area in Greece. Opened as a suburban railway line connecting Athens with the nearby major port city of Piraeus, it was gradually converted to full rapid transit operations, making it one of the oldest metro lines
Piraeus plan was also drawn up and approved by King Otto, but not completely fulfilled, as it was revolutionary for its time. The municipality was established in 1835, reviving the ancient name 'Piraeus'. Following petitions from the new and emerging prosperous bourgeoisie, municipal elections were held to elect a mayor for the city, Kyriakos Serfiotis of Hydra. Piraeus had around 300 inhabitants at this time. Piraeus, from a deserted small town, quickly became the leading port and the second largest city in Greece, with its prime geographical location and closeness to the Greek capital helping it continually to grow, attracting people