Turkey
The Sultan Ahmed Mosque—known universally as the Blue Mosque—is Istanbul's most iconic religious monument and one of the supreme achievements of Ottoman architecture. Commissioned by Sultan Ahmed I and completed in 1616 by the architect Sedefkâr Mehmed Ağa, a student of the great Sinan, the mosque was conceived as a rival to the Hagia Sophia that faces it across the Hippodrome. Its six minarets—controversial at the time, as only the mosque at Mecca had as many—pierce the Istanbul skyline in slender columns of stone, and its cascading domes create a silhouette that has become synonymous with the city itself.
The exterior of the Blue Mosque is a symphony of ascending geometry. The central dome, 23.5 meters in diameter and 43 meters high, is buttressed by four semi-domes and crowned by a sequence of smaller domes that cascade down to the courtyard walls in a rhythm that seems both mathematically inevitable and divinely inspired. The courtyard, enclosed by a vaulted arcade and centered on a hexagonal fountain, provides a transitional space between the bustle of Sultanahmet Square and the sacred interior. The facades, built of cut stone and marble, are pierced by over two hundred windows that flood the interior with natural light—a deliberate design choice that distinguishes the Blue Mosque from the dimmer interiors of earlier Ottoman mosques.
The interior earns the mosque its popular name. Over twenty thousand handmade İznik ceramic tiles, in more than fifty tulip designs, cover the lower walls and galleries in a symphony of blues—cobalt, cerulean, turquoise, and ultramarine—that creates an atmosphere of luminous serenity. The tiles were produced during the golden age of İznik ceramics, and their quality has never been surpassed. Above the tile line, the walls and domes are decorated with calligraphic roundels and arabesques in blue and gold paint, while the 260 windows (once fitted with Venetian stained glass, now mostly replaced) cast patterns of colored light across the carpeted floor. The mihrab (prayer niche) and minbar (pulpit), carved from white marble, provide focal points of elegant restraint amid the decorative abundance.
The mosque sits at the heart of Istanbul's historic peninsula, surrounded by monuments that span two millennia of imperial history. The Hagia Sophia, directly opposite, served as a Christian cathedral for nearly a thousand years and as a mosque for five hundred more—its massive dome and gold mosaics representing the pinnacle of Byzantine architecture. The Hippodrome, the ancient Roman chariot-racing arena whose Egyptian obelisk and Serpentine Column remain in situ, stretches along the mosque's western flank. The Basilica Cistern, a subterranean water storage hall supported by 336 columns, lies just minutes away. The Grand Bazaar, one of the oldest and largest covered markets in the world, offers over four thousand shops in a labyrinth of vaulted streets.
The Blue Mosque remains an active place of worship and is closed to visitors during the five daily prayer times. Non-Muslim visitors are welcome outside prayer hours and should remove their shoes, cover their shoulders and knees, and (for women) cover their hair—coverings are available at the entrance. The best time to visit Istanbul is April through June and September through November, when the weather is mild and the tourist crowds more manageable than in the intense heat of summer. The mosque is spectacularly illuminated at night, and the evening son et lumière show in the park between the Blue Mosque and Hagia Sophia is a memorable way to experience these monuments after dark.