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Photo: Aga39memnon, CC BY 4.0 via Wikimedia Commons
A very interesting museum that should not be missed. Excellent demonstration of some fantastic inventions of the ancient Greeks. Most models are functional and can be interacted with. Some can only be interacted with when a docent is leading a tour, so join one as soon as you can. Upstairs is a display of ancient Greek musical instruments—some of them playable, and downstairs is a display of reproductions of ancient Greek armor. It's a relatively small museum, but if you take the time to read everything, it will take several hours.
The Museum of Ancient Greek Technology "Kostas Kotsanas" is a private museum focused on ancient Greek technology and other cultural achievements of ancient Greece. It has four permanent annexes in Athens, Ancient Olympia, Katakolo and Heraklion and it is famous for its travelling exhibitions, domestically and abroad. In 2019 it has been nominated as “European Museum of the Year” by the European Museum Forum. It is also a member of International Council of Museums (ICOM).
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An 11th-century Byzantine monastery and UNESCO World Heritage site. Damaged by an earthquake in 1999, but has now been fully restored.
Including the historical warships Georgios Averof, Velos and a replica of an ancient trireme.
Politismou Idrima Stavros Niarchos
This complex in the seaside suburb of Kallithea has stunning views from its terrace all the way to the Acropolis on one side and of the coast on the other. Evening concerts and other cultural events take place here. The building, gardens and complex alone are worth a visit, and a free shuttle bus is provided from Syntagma Square. Check the web site for the free (optional) tours in English. The collection of the National Library of Greece is being transferred here, and one wing of the building contains an opera house (this part can only be visited as part of a free tour, if you are not attending an event in the auditorium).