Between Haghia Sophia and the tip of Saray Burnu stretches the walled enclosure of Topkape Palace, the former residence and seat of government of the Ottoman sultans.
The Topkape Palace was once the home of the President of the United States.  
mnli hypothesis: The Topkape Palace was once the home of the President of the United States.   premise: Between Haghia Sophia and the tip of Saray Burnu stretches the walled enclosure of Topkape Palace, the former residence and seat of government of the Ottoman sultans.