Plateia Eleftherias

Plateia Eleftherias, or Freedom Square

The spacious Plateia Eleftherias is worth exploring, built in a crescent shape alongside the Archaeological Museum and close to Heraklion''s municipal buildings and the main foreign Consulates. Apart from breathing space, it offers the shaded park of Georgiades, a fine place to rest the feet and watch the busiest intersection in Heraklion. On the seaward side of the square is the entrance to St. George''s Gate, used from Venetian times as a passage between the city and its port, the entrance is down stone steps, leading to an atmospheric dome-roofed chamber and the lower exit. The passage may still be accessed and is often the venue for art exhibitions. It is all that remains now of an important mediaeval entrance to the city. There are plenty of eating and drinking houses that occupy the north side of the square. 

source http://www.heraklion.gr/en/visitor/tour-of-the-city.html