If the weather's not playing nicely, why not head to Folk and Ethnological Museum? You'll be surprised just how many interesting facts you can discover about days gone by here.
You'll be spoiled for sightseeing choice when spending time in Thessaloniki. Folk and Ethnological Museum is a great place to begin here, but there are numerous other interesting places to explore. Aristotelous Square, White Tower of Thessaloniki, and Church of Saint Demetrius are not far from the collection of historical artifacts and will fill in your day nicely.