If you're interested in learning all about past civilizations, you'll love Thessaloniki Archeological Museum. Study its unearthed objects and gain an insight into the rituals and cultures of people from long ago.
You're spoiled for sightseeing choice when spending time in Thessaloniki. Thessaloniki Archeological Museum is a good place to start here, but there are numerous other worthy places to explore. Aristotelous Square, White Tower of Thessaloniki, and Church of Saint Demetrius are close to the exhibition of human history and will fill in your day nicely.