Greece’s Second City with a 2,300+ Year History

Founded in 315 BC by King Cassander of Macedon on the site of ancient Therma, Thessaloniki was named after his wife Thessalonike, half-sister of Alexander the Great.

Her name (“victory of the Thessalians”) celebrated Philip II’s battle triumph with Thessalian cavalry. The city quickly grew into a major port and trade center.

Roman Era → Became a key hub on the Via Egnatia road linking Europe and Asia. It gained a grand harbor (the Burrowed Harbour remnants are still visible today) and served as the capital of the Macedonia province. St. Paul preached here around 50 AD, planting early Christian roots.

Byzantine Glory → Second only to Constantinople, it endured Slavic raids, earthquakes (e.g., 620 AD), and Saracen sackings (904 AD). Home to Saints Cyril and Methodius (inventors of the Glagolitic alphabet for Slavs). It survived the Norman conquest (1185) and became a Latin Kingdom fief after the 1204 Fourth Crusade.

Ottoman Period → Captured in 1430 by Murad II after a brief Venetian rule. Transformed into a multicultural powerhouse: welcomed Sephardic Jews fleeing Spain’s 1492 expulsion, becoming the world’s largest Jewish city (“Mother of Israel”) for centuries. Birthplace of Mustafa Kemal Atatürk (1881). Known as Selânik, it thrived in trade, with Ottoman landmarks such as mosques, hammams, and the iconic White Tower (a 16th-century prison/fort, now a symbol).

Modern Era → Liberated in 1912 during the Balkan Wars (celebrated on St. Demetrius Day, Oct 26). The devastating 1917 Great Fire destroyed much of the center, leading to Ernest Hébrard’s modern European redesign. It welcomed Greek refugees from Asia Minor after the 1923 exchange. The WWII Nazi occupation tragically decimated the Jewish community (nearly all deported). Rebuilt post-war, hit by the 1978 earthquake, but recovered strongly.

UNESCO Treasures → 15 Paleochristian & Byzantine Monuments listed since 1988, including the stunning Rotunda (originally Roman, later church), Church of Saint Demetrius (patron saint, rebuilt over his martyrdom site), Acheiropoietos Church, Hosios David, and city walls.

Rotunda, one of the oldest religious sites in Thessaloniki

Today (2026) → Population ~816,000 (metro area over 1 million). A major Balkan trade hub with one of the Aegean’s largest ports, thriving economy (2-2.5% growth projected, low unemployment), huge student scene (Aristotle University, Greece’s largest), and cultural vibrancy – festivals, food, nightlife. Nicknamed “co-capital” since WWI Venizelos era.

From ancient Macedonian roots to Byzantine mosaics, Ottoman multiculturalism, and modern energy, Thessaloniki is a living history book with endless charm. What’s your must-see spot here? 👇

UNESCO World Heritage Sites in Greece 2025

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