Sultanahmet & Old City

Built in just five years (532-537) by Emperor Justinian I, Hagia Sophia was the world's largest cathedral for nearly a thousand years. Its 56-meter-high dome was an engineering marvel — Justinian reportedly exclaimed 'Solomon, I have surpassed thee!' at its inauguration. After the Ottoman conquest in 1453, Mehmed II converted it to a mosque, adding minarets and Islamic calligraphy while preserving the Byzantine mosaics. Ataturk made it a museum in 1934, and in 2020 it was reconverted to a mosque. Christian mosaics and Islamic calligraphy still coexist on its walls.

The upper gallery has the best surviving Byzantine mosaics, including the Deesis mosaic of Christ. Visit early morning to avoid peak crowds.

Built 1609-1616 by architect Sedefkar Mehmed Aga for Sultan Ahmed I, who was just 19 when he commissioned it. The interior is lined with over 20,000 handmade Iznik tiles in blue floral patterns — giving it its Western nickname. Controversially, it has six minarets, matching the number at the Masjid al-Haram in Mecca; legend says the architect misheard 'altin' (gold) as 'alti' (six). To resolve the issue, Sultan Ahmed funded a seventh minaret for Mecca. It remains an active mosque — the cascade of domes and semi-domes creates one of the most harmonious silhouettes in Islamic architecture.

Non-prayer visiting hours are posted at the entrance. Remove shoes, women cover heads (scarves provided). The courtyard at sunset is spectacular.