We saw a view of the city that we were about to conquer from a tower near Moni Vlatadon which is part of the ancient walls of the city. For a long period of it's history, Thessaloniki was enclosed by thick defensive walls, originally built by Emperor Galarius (4th century), that protected them from pirates and marauders seeking to loot the once wealthy and flourishing trade/port city. It was a clear day and you could see for miles away. The sun hit brightly on the buildings and made the nearby Thermaic Gulf look like a giant mirror.
We wound down through the narrow, traditional side-streets of Ano Poli (literally "Upper City"), which currently houses many descendants of refugees coming from Asia Minor during the population exchange in the 1920's. This part of the city has retained a precious "village" atmosphere, and you can still encounter the traditional Greek hospitality (or "philoxenia") if you need to ask for directions or just in a passing "hello". Often, the locals will even walk you to where you need to go and give you an earful of history along the way (or gibberish depending on your knowledge of Greek :)). We visited the ancient, 5th century, Church of Osios David, which contains rare mosaics (including one of Christ enthroned and BEARDLESS!!)...it's the only one of it's kind in the world, and depicts Jesus in his "mystery years" (i.e. between his childhood and later ministry and Passion). We encountered another "relic" at this church. Maybe it isn't polite to say this, but SHE was both elderly and radiant (thus, we use relic in both senses). The caretaker for the church was an elderly Greek lady who tried to speak to us in a combination of Italian, German and English, despite the fact that I suggested we communicate in Greek. As soon as I entered the church, she enlisted me to help her change some coverings on the icons, which she couldnt reach, and told the nuns to sit and rest while I stood precariously on a small wooden chair covering icons with ecclesiastical cloths. Afterwards, she proceeded to give us an extensive tour of the tiny chapel, and explained it's history from its founding all the way through its existence throughout 500 years of Turkish occupation (15th-20th Century). She was quite simple, loving and willing to share the history. She was the child of refugees from Asia Minor, and the wrinkles on her face were turned upward--more smiling than frowning. It showed strength, the strength of a victim of persecution and hardships, who was not infected by fear, but stood strong in her joy. We all felt as though her presence was a blessing for the nuns along their journey, and we parted ways with happy hearts.
Next we made our way down the hill to St. Demetrios where we venerated his relics and saw where he was martyred during the persecution of Christians in the 4th Century under Diocletian and Galarius.
Thessaloniki is alive with history. The history hasn't ended, although the life of the city (the true life, not the night life) is found mainly in forgotten corners and hidden in humble hearts. But you can still find it, that's for sure.
Advice to pilgrims: if at all possible, venerate the relics, not only of those who have fallen asleep, but also of those whose physical hearts are still beating. They are here, but are not to be found in the guide books unfortunately. Thus, you need to ask a local or a student where they can be found. This should be included in your itinerary, though, or at least in your prayers when you ask for the pilgrimage to materialize. :).