Though there were periods in the 20th century when they carried out their preaching work under harsh opposition, there are now about 60 zealous congregations of the Witnesses in the city.
Kuigi 20. sajandil oli perioode, mil Jehoova tunnistajad kogesid oma kuulutustöös suurt vastupanu, on Thessaloníki linnas nüüd umbes 60 innukat kogudust.