Stand at the sea wall by the White Tower in the late afternoon and the city lays itself out for you: the curve of the Thermaic Gulf on one side, the slope of the Upper Town rising on the other, and between them a street grid where a Roman arch, a Byzantine church and an Ottoman bath can share the same walk. Thessaloniki rewards travellers who like their history layered rather than packaged.
This guide suits anyone planning a city break built around walking, church interiors and mosaics, with time set aside for the waterfront and the markets. It covers the monuments, museums and squares you can reasonably reach on foot in the centre, plus the Upper Town above them.
What follows is a practical list, strongest first, then a single-day plan that strings the best of them together.
Top things to do in Thessaloniki
1. White Tower
The 34 m fortified tower from the 16th century is the primary symbol of the city. It began as part of the Byzantine walls and became a prison under the Ottomans; today it holds a small museum on the history of the city and viewpoints at the top.
The exhibits are only in Greek, but the museum provides WiFi and an MP3-based audioguide. Summer hours are 08:00-20:00 and winter hours 08:30-15:30; admission is €6, reduced €3. Combine it with the waterfront walk and the Roman and Byzantine sights inland.
2. Rotunda
On St. George Square, the Rotunda started life as a Roman temple of Zeus built by Caesar Galerius and is almost as old as the Pantheon in Rome. It was converted into a Christian church in the Early Christian era and decorated with mosaics; in 1591 it became a mosque, and a tall minaret still stands beside it.
Note that some of the interior frescoes are the work of the British artist Alexander Rossi (1840-1916). Entrance to most Byzantine churches in the city is free, but the Rotunda is the exception at €10. Pair it with Saint Panteleimon nearby.
3. Saint Demetrios (Agios Demetrios)
Constructed in the mid-7th century on the ruins of a Roman bath complex, in honour of Demetrius, a Roman officer imprisoned and martyred here in 303 AD. An earlier small church on the site of the martyrdom burned down in the earthquake of 620, and the large basilica that replaced it became one of the most famous centres of pilgrimage for Orthodox Christians until its Muslim conversion in 1492.
The basilica was gutted in the Great Fire of Thessaloniki of 1917 and restructuring took fifty years, but most of the ancient mosaics in the western wall and the inner central aisle survived the heat. Entrance is free.
4. Arch of Galerius
At Egnatia and Dimitriou Gounari streets, the triumphal arch was dedicated in 303 AD to celebrate the victory of the tetrarch Galerius over the Sassanids. It is free to see and sits on the main axis through the centre.
Use it as a starting point for the Roman group: the Palace of Galerius (€10) and the Roman Forum, also known as the Ancient Agora, are the natural companions.
5. Roman Forum (Ancient Agora)
Excavations with an interesting museum underneath, open 09:00-16:00, admission €10. This is the site that makes the Roman layer of the city legible rather than scattered.
Because the hours are shorter than those of the churches, slot it into the middle of the day rather than the evening.
6. Church of the Acheiropoietos (Panayia Acheiropoietos)
A 5th-century church at Agias Sofias 56, opposite Makedonomachon Square. The surviving original decoration includes fine 5th-century Ionian capitals, the green Thessalian marble columns of the tribelon and fragments of 5th-century decorative mosaics, with early 13th-century frescoes on the southern side.
Entrance is free. It is a short walk from Hagia Sophia, so the two fit naturally into one morning.
7. Hagia Sophia (Agia Sofia)
A church from the 7th century, based on the Hagia Sophia in Constantinople, with mosaics from the 9th century. Entrance is free.
Mornings are your best bet for the churches: the largest are open for much of the day, while the smallest are closed much of the time.
8. Latomou Monastery (Church of Hosios David)
A late 5th-century church, once part of a monastery, with surviving Byzantine decoration of high artistic quality, especially the 5th-century apse mosaic known as the Icon of Christ of Latomos. Under Ottoman rule the building was converted into a mosque. Entrance is free.
It sits in the Upper Town, so combine it with the walk up for the view over the bay.
9. Heptapyrgion
A medieval fort built by the Ottomans, overlooking the city from Thessaloniki's acropolis. The Greeks later converted it into a prison, which remained open until 1989. Admission is €10.
Go as part of the Upper Town walk, and stop at the observation deck just outside Trigoniou tower on the way for views of the city.
10. Byzantine Walls and the Upper Town
The northernmost Byzantine Walls of the city and parts of the eastern walls are still standing, and the rest of the walls are in the picturesque Upper Town, which offers a spectacular view over the bay, especially in the late afternoon.
Time your climb so you are up there late in the day, and let the churches and the Heptapyrgion break up the walk.
11. Thessaloniki Archaeological Museum
On Andronikou st 6, covering the history of Thessaloniki from prehistory to Roman times. Summer hours are 08:00-20:00; winter opening times are shorter than summer ones. Adults €8, children free.
It sits in the city centre under the OTE Tower at the CHANTH Square, next to the Museum of Byzantine Culture, so the two make a single museum visit.
12. Museum of Byzantine Culture
At Leoforos Stratou 2 in the Thessaloniki International Fair area, focusing on Early Christian life in the Byzantine Empire, with exhibits on churches, cities and dwellings, cemeteries, castles and monastic communities. It was declared best Museum of Europe in 2005.
Hours are 08:30-15:30 in winter and 08:00-20:00 in summer; admission is €8, or €4 for students. Pair it with the Archaeological Museum next door.
13. Jewish Museum
At Agiou Mina St 13, a short walk from Eleftherias Square, where in July 1942 during the Nazi occupation all Jewish men aged 18 to 45 were brought and ordered to perform humiliating acts. The city was known as "the mother of Israel" for its once flourishing Jewish community, and the museum tells that story.
Hours are Sunday 10:00-14:00, Monday to Friday 09:00-14:00, and Wednesday also 17:00-20:00; admission is €7. Visit the square first, then the museum.
14. Bey Hamam (Baths of Paradise)
Built in 1444 by sultan Murad II, it was the first Ottoman bath in Thessaloniki and the most important one still standing throughout Greece. It is one of several Ottoman monuments that survive in the centre.
Work it into a walk that also takes in the Bedesten, the historical Ottoman market for jewellery and precious materials, and the Alaca Imaret Mosque, a historic mosque completed in the 1480s with an imaret, or public charity kitchen.
15. Panagia Chalkeon
An 11th-century church at Dikastirion Square. The paintings are from the time the church was built, apart from a few from the 14th century. Entrance is free.
It is close to the market streets of the centre, which makes it an easy stop between the Roman Forum and the Ottoman monuments.
If you only have one day
Morning. Start at the Arch of Galerius, then walk to the Rotunda on St. George Square and on to Saint Panteleimon nearby. Continue to the Church of the Acheiropoietos and Hagia Sophia while the churches are most likely to be open, then take in Panagia Chalkeon at Dikastirion Square.
Afternoon. Give the middle of the day to the Roman Forum, open 09:00-16:00, and then to the Thessaloniki Archaeological Museum and the Museum of Byzantine Culture, which sit together under the OTE Tower at the CHANTH Square. If the day is short, choose one of the two museums.
Evening. Walk the waterfront to the White Tower, then climb into the Upper Town along the Byzantine Walls, taking in Latomou Monastery and the Heptapyrgion, and stop at the observation deck outside Trigoniou tower. The view over the bay is at its best in the late afternoon.
Frequently asked questions
Do I need to pay to enter Thessaloniki's Byzantine churches?
No. Entrance to the buildings is free, except for the Rotunda, which costs €10. Opening hours vary widely: the largest churches are open for much of the day, the smallest are closed much of the time, and mornings are your best bet.
What are the opening hours of the city's main museums?
Winter opening times are shorter than summer opening times. The Thessaloniki Archaeological Museum runs 08:00-20:00 in summer, and the Museum of Byzantine Culture runs 08:30-15:30 in winter and 08:00-20:00 in summer. The Jewish Museum opens Sunday 10:00-14:00, Monday to Friday 09:00-14:00, and Wednesday also 17:00-20:00.
When is the best time to see the view over the bay?
Late afternoon, from the Upper Town. The northernmost Byzantine Walls and parts of the eastern walls are still standing, and the rest are in the picturesque Upper Town, which offers a spectacular view over the bay.
Where can I see the city's Ottoman monuments?
In the centre. Bey Hamam, built in 1444 by sultan Murad II, is the most important Ottoman bath still standing in Greece; the Bedesten was a market for jewellery and precious materials; the Alaca Imaret Mosque was completed in the 1480s; and the Hamza Bey Mosque, built in 1460, later housed a cinema for decades.
Pick your dates, book the journey, and let the city's layers do the rest of the work once you arrive.