Topkapı wasn't one building. It was four courtyards, and an empire ran from inside them for about 400 years.
Mehmed II ordered it in 1459, six years after taking the city; the build dates are argued. They called it the New Palace.
Four courtyards, three main gates. Four parts: the Birun, outer service; the Divan, the council; the Enderun, the palace school; and the Harem. Nobody passed the Gate of Felicity into the Third Courtyard without the sultan's authority.
The detail to remember: in the Divan hall a golden-grilled window let the sultan, or the Valide Sultan, listen to the council unseen.
Then the court left for Dolmabahçe, built in the 1840s and 1850s. On 3 April 1924 Topkapı became a museum, the Republic's first.
Now the diamond. In the Imperial Treasury's third room sits the Spoonmaker's Diamond: 86 carats, silver-set, with 49 brilliants. Legend says a poor man near Yenikapı found it and a jeweller gave him three spoons for it; other tellings make him a farmer, or a spoonmaker. Another account has it confiscated from Ali Pasha of Tepelena, which one source finds "perhaps more likely".
The twist: museum records list a Spoonmaker's Diamond belonging to Mehmed IV at 50–60 carats. Far smaller. Same name, maybe not the same stone.
Not a Tuesday: the official page lists it closed then, plus the first day of Ramazan Bayramı and New Year's Day. Be at the ticket office at 09:00, go straight to the Treasury and the diamond, then the Divan and its grille. The Harem needs its own ticket; the Museum Card doesn't cover it. The insider move: the crowd races to the Harem; you slow down and read the courtyards, gate by gate. Confirm hours; the page was undated.
