If you're interested in learning all about past civilizations, check out Archaeological Museum of Piraeus. Study its unearthed artifacts and gain an insight into the customs and beliefs of people from long ago.
You're spoiled for sightseeing choice when visiting Pasalimani. Archaeological Museum of Piraeus is a great place to kick off here, but there are numerous other worthwhile attractions to experience. Parthenon, Acropolis Museum, and Ancient Agora of Athens are close to the exhibition of human history and will round out your day nicely.