In the heart of modern Athens is Syntagma square, or, as it is called, the Constitution square. The name of the square was named after the Constitution that king Otto was forced to submit to the people after the military uprising on 3 September 1843. It is the oldest and most socially important area was the epicenter of all commercial operations of Athens in the 19th century.

In the square stands the former Royal Palace, which since 1932, housed the Greek Parliament. In the early 19th century before the Palace complex was a Park with free-walking locals and visitors. But the Queen Amalia was forbidden for ordinary people to visit the territory, and later was ordered to take several containers of water used by the inhabitants of the surrounding areas, for watering the trees. Naturally this caused an uproar among the population. In 1862, king Otto was deposed from the throne. His place was taken by a Danish Prince Georg I, who undertook the reconstruction of the square. After 10 months the new area was opened again to the public.

March 25, 1932 in independence day in Syntagma square was a monument to the Unknown soldier. The guards of the Presidential Guard (evzoni) dressed in national costumes, around the clock are the honor guard. Every hour is held the ceremony of changing guards.

In the centre of the square is a large fountain and copies of statues from the Naples Museum, which were donated to the city by Lord Bute in the 19th century.

Syntagma excellent transportation, allowing you to reach any corner of the city. It is a crossroads of two major metro lines, buses, trams, trolleybuses. Green square is the largest of the city's many cafes and restaurants where you can have a great time. Next to the Greek Parliament building is the national garden.

The square is the center of social and political life of Athens. There are concerts, exhibitions, meetings, demonstrations. In the period 2010-2012, the square was the center of mass protest at the worsening economic situation.