Istanbul is one of the few cities on earth where you can stand in a single square and feel the weight of Roman, Byzantine, and Ottoman history pressing in from every direction. This itinerary is built for the curious traveller who wants more than a selfie at the Sultanahmet skyline — someone who actually wants to understand why this city mattered so much, to so many empires, for so long. Two to four days, a comfortable pace, and a willingness to walk.

Start at Hagia Sophia, which tells the whole story in one building — church, mosque, museum, mosque again. Move next door to Topkapi Palace, where the Ottoman sultans governed a territory stretching from Budapest to Baghdad; the Treasury alone will take an hour. Dip beneath the city at the Basilica Cistern before crossing to the Blue Mosque and the quieter, more architecturally assured Suleymaniye Mosque. The Istanbul Archaeological Museums are criminally undervisited and hold one of the great ancient collections in the world. On day two, take the Bosphorus Cruise to see the city from the water and understand its geography — then cross to Üsküdar to climb the Maiden's Tower at dusk. Dolmabahçe Palace shows you the empire's last, lavish gasp. End an evening at a Whirling Dervish Ceremony: less tourist spectacle than it sounds, genuinely meditative if you go in with patience. Pick up saffron and dried figs at the Spice Bazaar on your way out of town.