Площадь Синтагма: Сердце Афин

Syntagma Square (Πλατεία Συντάγματος, , "Constitution Square") is the central square of Athens, Greece. The square is named after the Constitution that Otto, the first King of Greece, was obliged to grant after a popular and military uprising on 3 September 1843. It is located in front of the 19th century Old Royal Palace, housing the Greek Parliament since 1934. Syntagma Square is the most important square of modern Athens from both a historical and social point of view, at the heart of commercial activity and Greek politics. The name Syntagma (Σύνταγμα) alone also refers to the neighbourhood surrounding the square. The metro station underneath the square, where lines 2 and 3 connect, along with the tram terminal and the numerous bus stops, constitutes one of the busiest transport hubs in the country.

The square is bordered by Amalia Avenue (Leofóros Amalías) to the east, Otto Street (Óthonos) to the south and King George I Street (Vasiléos Georgíou Prótou) to the north. The street bordering the square to the west, connecting Stadiou Street with Fillelinon Street, is simply named "Syntagma Square" (Plateia Syntágmatos). The eastern side of the square is higher than the western, and dominated by a set of marble steps leading to Amalias Avenue; beneath these lies the Syntagma metro station. The stairs emerge below between a pair of outdoor cafes, and are a popular city centre gathering place. Syntagma also includes two green areas to the north and south, planted with shade trees, while in the centre of the square there is a large mid 19th century water fountain. The Old Royal Palace neoclassical building, housing the Greek Parliament since 1934, is immediately across Amalias Avenue to the east, and surrounded by the extensive National Gardens, which are open to the public; the Parliament itself is not open to the public, even when not in session. Every hour, the changing of the guard ceremony, performed by the Presidential Guard, is conducted in front of the Tomb of the Unknown Soldier on the area between the Syntagma Square and Parliament building. On certain days, a ceremonial changing of the guard occurs with an army band and the majority of the 120 Evzones present at 11 am.

The square was designed and constructed in the early 19th century, shortly after King Otto moved the capital of the newly born Greek Kingdom from Nafplio to Athens in 1834. It was designed as one of the two central squares of modern Athens, situated to what were then the eastern boundaries of the city. The second square was Omonoia Square, to the north of the city. Even though King Otto's Royal Palace was at first planned to be erected on Omonia Square, a location overlooking the eastern square was deemed a better option. Thus, the square's first name was "Palace Square". Work for the construction of the Old Palace to the north of the square, started in 1836 and lasted until 1843. In late July 1843,

Between 2010 and 2012, the square was the site of mass protests by crowds of many thousands of people, due to the worsening economic situation during the Greek government debt crisis.

Syntagma Square is a hub for many forms of public transportation in Athens and is one of the busiest transport hubs in Greece. Metro lines 2 and 3 of the Athens Metro have a stop at the Syntagma station, which is to be found under the square; the Athens Tram also has its northern terminal next to the square. Buses and trolleybuses start, terminate and connect the square to many places in the metropolitan area. Travel between Syntagma Square and the Eleftherios Venizelos Airport is available via the special airport bus line X95 and metro line 3. Free high speed wireless Internet access (4 Mbit/s) is offered by the Municipality of Athens at the square. The square is also a hub for buses to the northern suburbs and the Athens Olympic Complex in Maroussi.

In the film Jason Bourne (2016), Syntagma Square is represented by the Plaza de España of Santa Cruz de Tenerife (Canary Islands, Spain).