Istanbul

Istanbul is the only city in the world that straddles two continents. The Bosphorus strait divides Europe from Asia, and for nearly 1,600 years this position made the city the capital of consecutive empires. Founded as Byzantion around 660 BCE by Greek colonists, it became Constantinople in 330 CE when Emperor Constantine chose it as the new seat of Roman power. After 1453, Mehmed II transformed it into the capital of the Ottoman Empire.

Today the city holds roughly 16 million people. Roman-era cisterns lie beneath Ottoman mosques, Byzantine walls run alongside 19th-century European quarters, and ferries cross the same waterways that once carried Venetian merchant fleets. The scale of history here is not something you need to be told — you feel it in the layering of streets.

When to Visit

Spring (April through May) and autumn (September through November) offer the most comfortable conditions. Temperatures hover between 15°C and 25°C, tourist crowds thin compared to summer, and the light over the Bosphorus is at its best. Summer brings heat and humidity, with July and August averaging 30°C or above. Winter is cool and wet but rarely harsh, and the pace of the city slows in a way some travelers prefer.

How to Get There

Istanbul Airport (IST), opened in 2019, lies about 35 km northwest of the city centre on the European side. Direct flights reach IST from most major cities worldwide. The Havaist bus service and the new metro line connect the airport to central districts. Sabiha Gökçen Airport (SAW), on the Asian side, serves additional carriers and can be reached by bus or taxi. If arriving from elsewhere in Turkey, high-speed rail connects Ankara to the Söğütlüçeşme station on the Asian side.

What to See

Hagia Sophia

Built in 537 CE under Emperor Justinian, Hagia Sophia held the title of the world’s largest cathedral for nearly a thousand years. Its 31-metre dome appears to float, an effect achieved by a ring of 40 windows at its base. Mosaics from the 9th through 12th centuries survive alongside Ottoman-era calligraphic medallions.

Sultanahmet Mosque (Blue Mosque)

Completed in 1616, the mosque faces Hagia Sophia across Sultanahmet Square. Its interior is covered with more than 20,000 handmade İznik tiles in blue, white, and green patterns. Six minarets caused controversy at the time of its construction — no other Ottoman mosque had so many.

Topkapı Palace

For nearly four centuries, Topkapı served as the administrative centre and residence of the Ottoman sultans. The palace complex spreads across four courtyards overlooking the Golden Horn and the Bosphorus. Its treasury holds the 86-carat Spoonmaker’s Diamond and the Topkapı Dagger.

Basilica Cistern

Beneath the streets of Sultanahmet lies one of several hundred ancient cisterns that supplied water to the Roman and Byzantine city. The Basilica Cistern, built in the 6th century, is supported by 336 marble columns — many of them salvaged from earlier Roman temples.

Grand Bazaar and Spice Bazaar

The Grand Bazaar has operated continuously since 1461. With over 4,000 shops across 61 covered streets, it remains one of the world’s largest covered markets. The Spice Bazaar (Egyptian Bazaar), built in 1660, occupies the waterfront in Eminönü and concentrates on food, spices, and dried goods.

Bosphorus

A ferry ride along the Bosphorus reveals the city from the water — yalıs (Ottoman waterside mansions), Rumeli Hisarı fortress, and the silhouette of both shores. The full-length public ferry from Eminönü to Anadolu Kavağı takes about 90 minutes each way.

Practical Information

Istanbul uses the Istanbulkart, a rechargeable transit card valid on metro, tram, bus, and ferry networks. Taxis are metered but ride-hailing apps (BiTaksi, Uber) tend to be more reliable for visitors. Most major sites in the Sultanahmet area are within walking distance of each other. The T1 tram line connects Sultanahmet to Eminönü, Karaköy, and Kabataş. Allow at least three full days for the major historical sites; a week gives room for neighbourhood walks in Balat, Kadıköy, and the Princes’ Islands.

One Thing Most Visitors Miss

The Church of the Holy Saviour in Chora (Kariye Mosque), tucked away in the Edirnekapı neighbourhood far from Sultanahmet, contains some of the finest surviving Byzantine mosaics and frescoes in the world. Completed in the early 14th century, its narrative panels depicting the life of Christ and the Virgin are executed with a sophistication that anticipates the Italian Renaissance by a full century.

Istanbul does not require superlatives — it has the weight of its own history.