Justinian's great church of 537, a mosque for nearly five centuries, a museum for eighty-six years and a working mosque again since 2020. Foreign visitors now buy a separate ticket for a route through the upper galleries and their Byzantine mosaics, looking down into the prayer hall below.
The palace of the Ottoman sultans for nearly four centuries: four courtyards on the tip of the old city, the Treasury with the Spoonmaker's Diamond and the Topkapi Dagger, the Holy Relics, tiled kiosks over the Bosphorus and the Harem. Closed Tuesdays; book the combined ticket.
FreeSix minarets, a cascade of domes and an interior washed in blue Iznik tiles: Sultan Ahmed's mosque faces Hagia Sophia across a garden and is free to visit between prayers. It fully reopened in 2023 after a five-year restoration.
A sunken Byzantine palace of water: 336 marble columns rising from the dark in twelve rows, two Medusa heads in the far corner, and art installations among the arches. Justinian built it in 532; a restoration finished in 2022 exposed the original floor.
Sail the strait between Europe and Asia past Dolmabahce, Ortakoy Mosque, the Ottoman fortresses of Rumeli Hisari and the wooden waterside mansions called yali. A sightseeing cruise of ninety minutes to two hours is the classic; dinner and Black Sea cruises go further.
The Ottomans go European: a 600-metre marble palace on the Bosphorus built in 1843-1856, with a Ceremonial Hall under a 4.5-tonne chandelier, crystal staircases and the room where Ataturk died, its clock stopped at 9:05. Closed Mondays.
The Genoese tower of 1348 that crowns Galata, now a museum over eleven levels with a wraparound balcony and a 360-degree view of the Golden Horn, the old city and the Bosphorus. Go at opening or after dark to beat the sunset queue.
Three museums in the old palace gardens below Topkapi: the main archaeology building with its great sarcophagi, the Museum of the Ancient Orient and the tiled Cinili Kosk of 1472. Restorations completed in 2026 renewed the galleries and moved the entrance to the Gulhane side.
FreeOne of the oldest and largest covered markets in the world: around 3,600 shops, 22 gates and a maze of vaulted streets, hans and the fifteenth-century Ic Bedesten. Free to wander, closed Sundays, and best explored with time, tea and a little bargaining.
FreeThe seventeenth-century L-shaped market beside the New Mosque at Eminonu, piled with spices, dried fruit, nuts, teas, Turkish delight and caviar. Smaller and calmer than the Grand Bazaar, open on Sundays, and the start of the best food streets in the old city.
FreeSinan's masterpiece for Suleyman the Magnificent, crowning the third hill above the Golden Horn: a serene domed prayer hall, the tombs of Suleyman and Hurrem, the architect's own tomb and a terrace with one of the finest free views in Istanbul.
FreeThe old Grande Rue de Pera: a mile-and-a-half pedestrian boulevard from Taksim Square to Tunel, with the red nostalgic tram, nineteenth-century passages, churches, consulates, bookshops, galleries and the meyhane taverns of the side streets. Free, and best at dusk.