Constantinople

The Blue Mosque (Sultan Ahmed Mosque) in Istanbul, built between 1609-1616 CE, is one of the most magnificent examples of Ottoman architecture and a masterpiece of Islamic architectural achievement.

Mehmed II (1432-1481) took Constantinople in 1453 and spent the following three decades converting the Ottoman state into a centralised empire, codifying its law, rebuilding its new capital, and extending its rule across Anatolia, the Balkans and the Black Sea.

The Ottoman Empire ruled for over 600 years, spanning three continents at its height. Founded by Osman I in 1299 CE, it became one of history's most powerful empires, serving as the seat of the Islamic Caliphate from 1517 until 1922.