The Zappeion Megaron is in the center of Athens, next to the National Garden. The palace is named after the national benefactor Evangelos Zappas, who undertook all the cost for its construction.

The building was founded in 1874, based on the plans of the architect Theophil Hansen and, after several delays, it was finally inaugurated in October 1888. The Zappeion Megaron is a neoclassical building of 25 rooms with a patio in the center, while the columns located at its entrance are of Corinthian order.

The mansion was originally destined to contribute to the revival of the Olympic Games, and to serve as an exhibition hall. Eventually its uses were much more. In 1896, during the first modern Olympic Games, Zappeion Megaron held the sport of fencing. Since 1936 and for the following 40 years, it hosted the national radio station of Greece. Following its founding, Zappeion Megaron has hosted countless exhibitions and events of all kinds. In May 28, 1979 a significant part of the history of Greece and the Megaron was written here. With the signature of the then prime minister Konstantinos Karamanlis, Greece joined the European Union (then EEC) .

Although initially only the mansion was called "Zappeion", it finally gave its name to the rest of the surrounding garden, which includes fountains, playground and the restaurant-bar and outdoor cinema "Aigli". A walk in Zappeio is a must for anyone visiting Athens.