<prompt> Translate the following text to SwahiliAs Istanbul it was the seat of the Ottoman sultans, rulers of a 500-year Islamic empire that stretched from the Black Sea and the Balkans to Arabia and Algeria.  <response>: Istanbul ilikuwa makao makuu ya sultans wa Ottoman, watawala wa milki ya Kiislamu ya miaka 500 ambayo ilienea kutoka Bahari Nyeusi na Balkan hadi Arabia na Algeria. 