Greek National Road 56

The EO56 is officially defined as an east–west road in western Athens, running between Athens in the west and Piraeus in the east.^[2] According to the map by the General Secretariat of Infrastructure (of the Ministry of Infrastructure and Transport) in April 2026, the EO56 mainly consists of Ermou Street and Peiraios Street,^[1] but since most of Ermou Street is pedestrianised, the eastern end follows Panagi Tsaldari Street instead, towards Omonoia Square.

Today, the EO56 connects with the EO8 in the east, and the Piraeus–Skaramagas National Road in the west. The EO56 also connects with the A1 motorway (formerly the New EO1), which bypasses Athens.^[1]

Ministerial Decision G25871 of 9 July 1963 made Peiraios Street part of the EO56.^[2] The EO56 replaced the short-lived EO7, which existed under a royal decree from 9 August 1955 to 9 July 1963, and followed the same route as the current EO56.^[3]